12P/Pons-Brooks
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
08.37,
8.8,
3'
(O. Miyazaki,
0.32-m
Newtonian);
   
08.08,
9.0,
3'
(C. Hergenrother,
Tanque Verde, Arizona,
30x125.0
Binoculars);
   
07.86,
10.8,
3.2'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
   
07.79,
8.8,
2'
(U. Pilz,
0.105-m
Refractor);
   
07.43,
8.6,
7.3'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD;
15'
tail in p.a. 25 deg);
   
07.43,
8.2,
5.5'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
07.43,
9.0,
7.3'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
07.37,
8.9,
4.3'
(O. Miyazaki,
0.32-m
Newtonian);
   
06.81,
9.1,
3'
(A. Scholten,
Eerbeek,
0.2-m
Newtonian);
   
06.76,
9.1,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
06.39,
10.2,
2.4'
(O. Miyazaki,
0.32-m
Newtonian);
   
05.82,
9.1,
6.5'
(M. Phillips,
ASERO Trevinca Skies, Spain,
0.094-m
Refractor + CCD);
   
05.82,
8.8,
8.8'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD;
9'
tail in p.a. 30 deg);
   
05.71,
9.3,
3'
(P. Guzik,
25x100
Binoculars);
   
04.76,
8.8,
5'
(C. Labordena,
La Serra d Engarcera,
0.2-m
Schmidt-Cassegrain);
   
04.73,
9.0,
6.6'
(D. Buczynski,
Tarbatness MPC I81,
0.35-m
Schmidt-Cassegrain + CCD);
   
04.70,
8.7,
3.5'
(B. Granslo,
Hakadal,
0.08-m
Refractor);
   
04.38,
9.2,
4.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
03.79,
10.2,
1.9'
(J. Solaz,
Caldes de Montbui,
0.254-m
Newtonian + CCD);
   
03.72,
8.7,
4'
(A. Kammerer,
Karlsruhe, Germany,
0.203-m
Schmidt-Cassegrain);
   
03.42,
8.3,
2.7'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
03.41,
9.4,
6.1'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
03.41,
8.7,
6.1'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD;
8'
tail in p.a. 33 deg);
   
03.38,
8.9,
5.3'
(O. Miyazaki,
0.32-m
Newtonian);
   
02.81,
8.5,
6'
(J. Gonzalez Suarez,
0.203-m
Schmidt-Cassegrain);
   
02.80,
8.8,
4'
(V. Díaz,
La Romana, Alicante, Spain,
0.2-m
Newtonian);
   
02.79,
8.9,
7.3'
(M. Phillips,
ASERO Trevinca Skies, Spain,
0.094-m
Refractor + CCD;
10'
tail in p.a. 34 deg);
   
02.77,
8.8,
7.6'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD;
12'
tail in p.a. 30 deg);
   
02.76,
8.7,
3'
(B. Granslo,
Hakadal,
0.08-m
Refractor);
   
02.75,
10.3,
4.2'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
   
02.41,
8.7,
3'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
02.41,
9.8,
5'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
02.41,
8.9,
5'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD;
10'
tail in p.a. 33 deg);
   
02.39,
8.8,
2.5'
(Y. Yamaguchi,
0.076-m
Refractor + CCD);
   
02.38,
8.8,
3.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
01.78,
9.1,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
01.76,
9.0,
9'
(D. Buczynski,
Tarbatness MPC I81,
0.3-m
Newtonian + CCD);
   
01.76,
10.2,
2'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
   
01.76,
9.8,
1'
(A. Scholten,
Bussloo,
0.356-m
Schmidt-Cassegrain);
   
01.38,
10.2,
0.5'
(O. Miyazaki,
0.32-m
Newtonian);
nov
30.81,
8.9,
8'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD;
0.23° tail in p.a. 37 deg);
   
30.41,
9.6,
5.6'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
29.67,
9.2,
4'
(P. Guzik,
25x100
Binoculars);
   
28.74,
9.4,
4.1'
(M. Phillips,
Forthimage Observatory, Edinburgh UK,
0.25-m
Newtonian + CCD);
   
27.42,
8.9,
3.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
26.42,
9.5,
4'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
25.79,
9.2,
4.3'
(M. Phillips,
ASERO Trevinca Skies, Spain,
0.094-m
Refractor + CCD);
   
25.78,
9.4,
5'
(D. Buczynski,
Tarbatness MPC I81,
0.35-m
Schmidt-Cassegrain + CCD);
   
25.77,
9.3,
5.8'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD;
6'
tail in p.a. 35 deg);
   
24.82,
9.3,
1.8'
(V. Kasten,
20x80
Binoculars);
   
24.79,
8.9,
5.8'
(E. Bryssinck,
0.4-m
Newtonian + CCD);
   
24.77,
8.9,
9'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD;
10'
tail in p.a. 39 deg);
   
24.77,
9.5,
4.8'
(M. Phillips,
ASERO Trevinca Skies, Spain,
0.094-m
Refractor + CCD);
   
24.77,
9.0,
7.5'
(T. Lehmann,
Nerpio (remote),
0.32-m
Refractor + CCD);
   
23.78,
9.3,
4.5'
(M. Phillips,
ASERO Trevinca Skies, Spain,
0.094-m
Refractor + CCD;
18'
tail in p.a. 40 deg);
   
23.77,
9.0,
8.6'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD);
   
23.40,
9.6,
3'
(O. Miyazaki,
0.32-m
Newtonian);
   
22.80,
8.8,
10.2'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
22.77,
8.6,
14'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD);
   
22.75,
8.8,
5.6'
(M. Paradowski,
Lublin, Poland,
0.068-m
Refractor + CCD);
   
22.74,
9.0,
4.2'
(M. Paradowski,
Lublin, Poland,
0.068-m
Refractor + CCD);
   
22.41,
9.6,
3.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
22.40,
8.7,
5.2'
(Y. Yamaguchi,
0.076-m
Refractor + CCD);
   
21.83,
8.7,
10'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
21.80,
9.1,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
21.80,
8.8,
3.5'
(C. Harder,
Jeersdorf h,
0.298-m
Newtonian);
   
21.43,
8.4,
3.6'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
21.43,
8.8,
5'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
21.42,
9.7,
4'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
21.39,
8.9,
3.2'
(O. Miyazaki,
0.32-m
Newtonian);
   
21.13,
8.9,
--
(G. van Buitenen,
Auberry, CA (U69),
0.61-m
Ritchey-Chretien + CCD);
   
21.07,
9.0,
3'
(C. Hergenrother,
Tanque Verde, Arizona,
30x125.0
Binoculars);
   
20.74,
9.7,
--
(U. Pilz,
16x70
Binoculars);
   
20.67,
11.0,
1.5'
(S. Shurpakov,
0.41-m
Newtonian + CCD);
   
20.43,
8.5,
7'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD;
15'
tail in p.a. 45 deg);
   
20.43,
8.3,
3'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
20.43,
9.5,
5.5'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
20.38,
9.4,
2.6'
(O. Miyazaki,
0.32-m
Newtonian);
   
20.07,
8.9,
3.5'
(C. Hergenrother,
Tanque Verde, Arizona,
30x125.0
Binoculars);
   
19.78,
9.4,
--
(J. Czyz,
Erding / Bavaria,
25x100
Binoculars);
   
19.78,
8.4,
11'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD;
21'
tail in p.a. 46 deg);
   
19.78,
9.0,
7'
(R. Arnold,
Trevinca, Spain,
0.094-m
Refractor);
   
19.78,
9.0,
4.7'
(M. Phillips,
ASERO Trevinca Skies, Spain,
0.094-m
Refractor + CCD;
18'
tail in p.a. 44 deg);
   
19.72,
9.0,
3'
(M. Meyer,
0.152-m
Refractor);
   
19.40,
9.3,
2.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
19.39,
9.0,
3'
(Y. Sugiyama,
0.12-m
Refractor);
   
19.12,
8.4,
6.8'
(K. Yoshimoto,
0.431-m
Newtonian + CCD;
14'
tail in p.a. 45 deg);
   
19.06,
8.8,
2.5'
(C. Hergenrother,
30x125.0
Binoculars);
   
19.03,
9.1,
1.9'
(D. Zubenel,
De Soto, Kansas.,
0.318-m
Newtonian);
   
18.81,
8.9,
3'
(R. Arnold,
Trevinca, Spain,
0.94-m
Refractor;
10'
tail);
   
18.81,
8.6,
8.5'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
18.74,
8.4,
13'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.27° tail in p.a. 44 deg);
   
18.74,
9.2,
3'
(M. Deconinck,
Artignosc-sur-Verdon, Provence, France,
0.25-m
Cassegrain reflector);
   
18.70,
8.7,
3'
(V. Bespalov,
Moscow region, Ruza district,
0.2-m
Newtonian);
   
18.40,
10.1,
1.6'
(O. Miyazaki,
0.32-m
Newtonian);
   
18.17,
8.6,
7.2'
(D. Heggie,
UDRO, Utah,
0.15-m
Refractor + CCD;
8'
tail in p.a. 49 deg);
   
18.09,
8.5,
12'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD;
0.2° tail in p.a. 46 deg);
   
17.82,
8.3,
7.71'
(K. Hills,
0.5-m
Newtonian + CCD);
   
17.82,
9.0,
5'
(D. Buczynski,
Tarbatness MPC I81,
0.35-m
Schmidt-Cassegrain + CCD);
   
17.81,
9.0,
3.6'
(V. Kasten,
20x80
Binoculars);
   
17.74,
9.3,
3'
(C. Harder,
Jeersdorf f,
0.298-m
Newtonian);
   
17.74,
8.9,
5.5'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
17.74,
8.7,
4'
(D. Vansteelant,
Varsenare,
0.3-m
Newtonian);
   
17.71,
9.2,
2'
(G. Pappa,
Piemonte,Italy (remote control),
0.2-m
Ritchey-Chretien + CCD);
   
17.40,
8.8,
1.6'
(O. Miyazaki,
0.32-m
Newtonian);
   
16.95,
9.7,
4.32'
(D. Buczynski,
Tarbatness MPC I81,
0.35-m
Schmidt-Cassegrain + CCD);
   
16.82,
8.8,
7'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
16.81,
9.0,
4.7'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD);
   
16.80,
9.2,
1.5'
(J. Gonzalez Suarez,
0.203-m
Schmidt-Cassegrain);
   
16.77,
8.9,
3'
(M. Deconinck,
Artignosc-sur-Verdon, Provence, France,
0.25-m
Cassegrain reflector);
   
16.49,
9.5,
--
(J. Pile,
Bulacan, Philippines,
0.06-m
"small telescopes and finders" with aperture not exceeding 4 inches);
   
15.84,
8.9,
3.2'
(M. Mašek,
0.25-m
Schmidt-Cassegrain + CCD);
   
15.84,
8.9,
5.9'
(M. Mašek,
0.25-m
Schmidt-Cassegrain + CCD);
   
15.83,
9.1,
4.3'
(R. Arnold,
Dunhallin Skye,
0.2-m
Schmidt-Cassegrain + CCD);
   
15.82,
8.9,
4.9'
(D. Buczynski,
Tarbatness MPC I81,
0.35-m
Schmidt-Cassegrain + CCD);
   
15.79,
9.0,
3'
(M. Reszelski,
Szamotuly, Poland,
25x100
Binoculars);
   
15.75,
10.3,
6.2'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
15.74,
9.2,
14'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD;
0.17° tail in p.a. 38 deg);
   
15.74,
8.9,
3.76'
(N. James,
0.28-m
Schmidt-Cassegrain + CCD);
   
15.74,
8.6,
--
(G. Scheerle,
9x63.0
Binoculars);
   
15.74,
8.6,
4'
(G. Scheerle,
0.235-m
Schmidt-Cassegrain);
   
15.71,
9.0,
3'
(P. Guzik,
25x100
Binoculars);
   
15.41,
9.9,
1.2'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
15.41,
9.2,
2.4'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
15.41,
8.5,
1.2'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
15.40,
9.4,
0.4'
(O. Miyazaki,
0.32-m
Newtonian);
   
14.86,
9.5,
6.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
14.85,
10.1,
--
(V. Díaz,
La Romana, Alicante, Spain,
0.3-m
Newtonian);
   
14.40,
10.9,
2.2'
(O. Miyazaki,
0.32-m
Newtonian);
   
13.87,
10.7,
5.2'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
13.75,
10.5,
4'
(P. Guzik,
25x100
Binoculars);
   
13.73,
11.0,
2'
(G. Pappa,
Pedara,Sicily,Italy,
0.3-m
Camera lens + CCD);
   
13.72,
11.2,
3.01'
(N. Quinn,
0.28-m
Schmidt-Cassegrain + CCD);
   
13.45,
10.5,
2.5'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
13.45,
11.1,
3.1'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
13.44,
11.7,
3.1'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
12.84,
10.7,
5.08'
(K. Hills,
0.5-m
Newtonian + CCD);
   
12.78,
10.7,
7.5'
(D. Buczynski,
Tarbatness MPC I81,
0.3-m
Newtonian + CCD);
   
12.77,
10.1,
3.5'
(C. Harder,
Jeersdorf f,
0.298-m
Newtonian);
   
12.41,
10.6,
5'
(Y. Yamaguchi,
0.076-m
Refractor + CCD);
   
11.85,
10.5,
7.3'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
11.76,
11.0,
4.14'
(N. James,
0.28-m
Schmidt-Cassegrain + CCD);
   
10.86,
10.7,
2.1'
(V. Díaz,
La Romana, Alicante, Spain,
0.25-m
Newtonian);
   
10.73,
11.6,
3.95'
(N. Quinn,
0.28-m
Schmidt-Cassegrain + CCD);
   
10.72,
12.7,
1.55'
(S. Shurpakov,
0.2-m
Schmidt-Newtonian + CCD);
13P/Olbers
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
09.55,
17.3,
0.3'
(A. Pearce,
Nedlands, W. Australia,
0.35-m
Schmidt-Cassegrain + CCD);
   
07.56,
17.4,
0.4'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
03.58,
17.6,
0.3'
(A. Pearce,
Nedlands, W. Australia,
0.35-m
Schmidt-Cassegrain + CCD);
   
02.55,
17.4,
0.3'
(A. Pearce,
Nedlands, W. Australia,
0.35-m
Schmidt-Cassegrain + CCD);
nov
12.08,
19.0,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
29P/Schwassmann-Wachmann
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
25.25,
15.0,
0.94'
(K. Hills,
0.5-m
Newtonian + CCD);
   
23.25,
15.6,
1.13'
(K. Hills,
0.5-m
Newtonian + CCD);
   
22.14,
13.6,
3.6'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
22.13,
13.0,
--
(G. Pappa,
Namibia (remote control),
0.11-m
Refractor + CCD);
   
19.07,
14.4,
2.3'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
18.26,
15.0,
1.5'
(K. Hills,
0.5-m
Newtonian + CCD);
   
18.11,
13.7,
0.9'
(W. Kutschera,
0.54-m
Newtonian);
   
16.26,
15.1,
1.5'
(K. Hills,
0.5-m
Newtonian + CCD);
   
15.74,
15.3,
0.5'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
15.53,
12.2,
8.5'
(T. Lehmann,
Utah (remote),
0.28-m
Newtonian + CCD;
0.09° tail in p.a. 301 deg);
   
12.10,
16.3,
0.4'
(P. Dekelver,
0.3-m
Newtonian + CCD);
30P/Reinmuth
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
26.77,
18.5,
--
(G. Pappa,
Piemonte,Italy (remote control),
0.2-m
Ritchey-Chretien + CCD);
   
15.83,
17.3,
0.6'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
13.99,
18.6,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
13.91,
17.4,
0.6'
(P. Dekelver,
0.3-m
Newtonian + CCD);
32P/Comas Sola
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
09.54,
14.9,
0.7'
(A. Pearce,
Nedlands, W. Australia,
0.35-m
Schmidt-Cassegrain + CCD);
   
06.79,
14.3,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
05.50,
13.5,
1'
(C. Wyatt,
0.4-m
Newtonian);
   
03.49,
14.3,
1.2'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
01.77,
15.0,
0.5'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
nov
30.85,
14.6,
1.2'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD;
0.7'
tail in p.a. 90 deg);
   
25.92,
16.3,
0.9'
(M. Lombardo,
Scandicci ( Zen observatory),
0.3-m
Ritchey-Chretien + CCD);
   
22.10,
14.5,
0.6'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
21.84,
14.3,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
20.73,
15.6,
0.38'
(S. Shurpakov,
0.41-m
Newtonian + CCD);
   
18.95,
14.2,
1.3'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
15.90,
14.0,
1.32'
(D. Buczynski,
Tarbatness I81,
0.35-m
Schmidt-Cassegrain + CCD);
   
15.89,
14.1,
1.8'
(P. Dekelver,
0.3-m
Newtonian + CCD;
8.6'
tail in p.a. 246 deg);
   
15.86,
14.3,
2.2'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.09° tail in p.a. 246 deg);
   
14.01,
14.1,
3.2'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD;
0.07° tail in p.a. 245 deg);
   
12.06,
14.9,
0.75'
(K. Hills,
0.5-m
Newtonian + CCD);
   
11.99,
14.2,
1.5'
(P. Dekelver,
0.3-m
Newtonian + CCD;
3.6'
tail in p.a. 246 deg);
62P/Tsuchinshan
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
10.12,
8.8,
5.3'
(M. Collins,
Everton,
0.254-m
Schmidt-Cassegrain;
7.9'
tail in p.a. 346 deg);
   
09.27,
9.2,
4'
(M. Goiato,
20x100
Binoculars);
   
08.78,
10.2,
5.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
07.80,
8.9,
11.5'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD;
8'
tail in p.a. 295 deg);
   
05.94,
9.0,
8'
(P. Guzik,
25x100
Binoculars);
nov
28.21,
9.8,
3'
(G. Pappa,
Piemonte,Italy (remote control),
0.2-m
Ritchey-Chretien + CCD);
   
26.20,
9.0,
17'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD;
6'
tail in p.a. 281 deg);
   
24.81,
10.3,
4.9'
(O. Miyazaki,
0.32-m
Newtonian);
   
24.22,
9.3,
9.9'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD);
   
24.22,
10.1,
4'
(C. Labordena,
Culla,
0.2-m
Schmidt-Cassegrain);
   
23.80,
10.5,
3.8'
(O. Miyazaki,
0.32-m
Newtonian);
   
23.75,
10.0,
4.4'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
22.80,
10.8,
4.2'
(O. Miyazaki,
0.32-m
Newtonian);
   
22.52,
9.8,
5'
(C. Hergenrother,
Tanque Verde, Arizona,
30x125.0
Binoculars);
   
22.20,
9.5,
11.8'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
22.17,
9.6,
5.5'
(M. Meyer,
0.152-m
Refractor);
   
22.07,
9.2,
15'
(T. Lehmann,
Hakos (remote),
0.106-m
Refractor + CCD;
1.9'
tail in p.a. 289 deg);
   
22.04,
10.0,
4'
(C. Harder,
Jeersdorf h,
0.298-m
Newtonian);
   
22.00,
10.3,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
21.98,
9.9,
4'
(T. Karhula,
Virsbo, Sweden,
0.12-m
Refractor);
   
21.80,
10.5,
3'
(O. Miyazaki,
0.32-m
Newtonian);
   
20.80,
9.6,
4.2'
(O. Miyazaki,
0.32-m
Newtonian);
   
20.74,
10.1,
5.3'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
20.20,
9.0,
17'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD;
4'
tail in p.a. 286 deg);
   
19.80,
10.8,
3.6'
(O. Miyazaki,
0.32-m
Newtonian);
   
19.50,
10.1,
7'
(R. Arnold,
Trevinca, Spain,
0.094-m
Refractor);
   
19.20,
9.4,
16'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD);
   
19.07,
9.9,
10.1'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
18.80,
10.7,
2.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
18.76,
10.4,
3.8'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
18.14,
10.2,
8.2'
(W. Kutschera,
0.25-m
Newtonian);
   
18.00,
9.5,
4.5'
(C. Harder,
Jeersdorf h,
0.252-m
Newtonian);
   
17.80,
10.3,
3.7'
(O. Miyazaki,
0.32-m
Newtonian);
   
17.00,
9.5,
2'
(G. Pappa,
Piemonte,Italy (remote control),
0.2-m
Ritchey-Chretien + CCD);
   
16.26,
9.5,
9.59'
(K. Hills,
0.5-m
Newtonian + CCD);
   
15.80,
10.3,
3.9'
(O. Miyazaki,
0.32-m
Newtonian);
   
15.74,
10.2,
4.7'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
15.53,
9.6,
17'
(T. Lehmann,
Utah (remote),
0.28-m
Newtonian + CCD;
0.31° tail in p.a. 286 deg);
   
15.19,
10.0,
6'
(M. Deconinck,
Artignosc-sur-Verdon, Provence, France,
0.25-m
Cassegrain reflector);
   
14.20,
10.3,
2'
(J. de Souza Aguiar,
0.3-m
Newtonian);
   
13.82,
10.7,
2'
(O. Miyazaki,
0.32-m
Newtonian);
   
13.75,
10.9,
3.2'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
13.09,
10.1,
3'
(C. Harder,
Jeersdorf h,
0.298-m
Newtonian);
   
12.93,
10.2,
5'
(P. Guzik,
25x100
Binoculars);
   
12.14,
8.6,
5.5'
(P. Dekelver,
0.3-m
Newtonian + CCD;
1.9'
tail in p.a. 286 deg);
   
11.28,
10.5,
2.5'
(M. Goiato,
0.22-m
Newtonian);
   
10.80,
11.0,
2.3'
(O. Miyazaki,
0.32-m
Newtonian);
71P/Clark
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
13.96,
19.7,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
103P/Hartley
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
08.77,
11.5,
1.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
01.33,
10.1,
10'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.09° tail in p.a. 288 deg);
nov
30.28,
10.0,
11'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.09° tail in p.a. 290 deg);
   
29.33,
10.0,
11'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.11° tail in p.a. 289 deg);
   
29.19,
10.0,
10'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.06° tail in p.a. 291 deg);
   
28.48,
10.0,
11'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD;
1.8'
tail in p.a. 301 deg);
   
28.30,
10.0,
12'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.15° tail in p.a. 288 deg);
   
26.54,
9.9,
10'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD);
   
26.42,
10.1,
10'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD;
0.08° tail in p.a. 296 deg);
   
26.19,
10.1,
9.5'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.13° tail in p.a. 290 deg);
   
26.10,
10.3,
8.5'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.13° tail in p.a. 288 deg);
   
25.26,
10.0,
9.02'
(K. Hills,
0.5-m
Newtonian + CCD);
   
24.82,
10.6,
2.9'
(O. Miyazaki,
0.32-m
Newtonian);
   
24.20,
10.2,
3'
(C. Labordena,
Culla,
0.2-m
Schmidt-Cassegrain);
   
23.81,
11.1,
4.1'
(O. Miyazaki,
0.32-m
Newtonian);
   
23.76,
10.9,
3.2'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
23.34,
9.4,
18'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.3° tail in p.a. 289 deg);
   
22.82,
11.0,
2.3'
(O. Miyazaki,
0.32-m
Newtonian);
   
22.51,
9.9,
3'
(C. Hergenrother,
Tanque Verde, Arizona,
30x125.0
Binoculars);
   
22.50,
9.5,
13'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD;
0.1° tail in p.a. 291 deg);
   
22.18,
10.2,
9.8'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
22.16,
9.6,
4.5'
(M. Meyer,
0.152-m
Refractor);
   
22.11,
9.7,
15'
(T. Lehmann,
Hakos (remote),
0.106-m
Refractor + CCD;
0.33° tail in p.a. 291 deg);
   
22.11,
9.6,
14'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD;
0.33° tail in p.a. 290 deg);
   
22.03,
9.7,
13'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD;
0.33° tail in p.a. 289 deg);
   
21.81,
11.0,
2.9'
(O. Miyazaki,
0.32-m
Newtonian);
   
21.53,
9.7,
13'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD;
0.15° tail in p.a. 288 deg);
   
21.43,
9.7,
13'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD;
0.14° tail in p.a. 289 deg);
   
20.82,
11.1,
2.2'
(O. Miyazaki,
0.32-m
Newtonian);
   
20.74,
11.3,
2.5'
(K. Harikae,
0.15-m
Newtonian + CCD;
4'
tail in p.a. 290 deg);
   
20.33,
9.3,
16'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.3° tail in p.a. 287 deg);
   
19.81,
10.4,
2.3'
(O. Miyazaki,
0.32-m
Newtonian);
   
19.09,
10.0,
9.2'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
18.81,
11.0,
2.9'
(O. Miyazaki,
0.32-m
Newtonian);
   
18.76,
10.9,
3.1'
(K. Harikae,
0.15-m
Newtonian + CCD;
5'
tail in p.a. 283 deg);
   
18.34,
9.3,
17'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.19° tail in p.a. 288 deg);
   
18.19,
9.4,
15'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.26° tail in p.a. 288 deg);
   
18.18,
10.0,
3.8'
(W. Kutschera,
0.25-m
Newtonian);
   
18.12,
9.4,
15'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.42° tail in p.a. 286 deg);
   
17.81,
10.1,
3.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
17.45,
9.4,
11'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD);
   
17.36,
9.3,
14'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.26° tail in p.a. 288 deg);
   
16.34,
9.2,
16'
(T. Lehmann,
Chile (remote),
0.18-m
Newtonian + CCD;
0.52° tail in p.a. 286 deg);
   
16.17,
9.5,
13'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.42° tail in p.a. 287 deg);
   
16.08,
9.4,
15'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.38° tail in p.a. 286 deg);
   
15.82,
10.3,
3.5'
(O. Miyazaki,
0.32-m
Newtonian);
   
15.74,
10.9,
2.5'
(K. Harikae,
0.15-m
Newtonian + CCD;
6'
tail in p.a. 290 deg);
   
15.22,
9.8,
2'
(M. Deconinck,
Artignosc-sur-Verdon, Provence, France,
0.25-m
Cassegrain reflector);
   
14.46,
9.3,
17'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD;
0.39° tail in p.a. 287 deg);
   
14.21,
10.6,
2'
(J. de Souza Aguiar,
0.3-m
Newtonian);
   
13.81,
10.2,
2.6'
(O. Miyazaki,
0.32-m
Newtonian);
   
13.74,
11.1,
2.2'
(K. Harikae,
0.15-m
Newtonian + CCD;
5'
tail in p.a. 290 deg);
   
12.16,
11.5,
3.7'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
11.26,
10.2,
4'
(M. Goiato,
0.22-m
Newtonian);
   
11.22,
9.9,
7.3'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
11.18,
9.4,
11'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.07° tail in p.a. 286 deg);
   
11.11,
9.2,
15'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.42° tail in p.a. 286 deg);
   
10.81,
9.9,
2.2'
(O. Miyazaki,
0.32-m
Newtonian);
117P/Helin-Roman-Alu
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
13.95,
17.2,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
11.91,
15.7,
0.7'
(P. Dekelver,
0.3-m
Newtonian + CCD;
2.3'
tail in p.a. 241 deg);
126P/IRAS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
02.78,
17.3,
0.2'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
nov
22.87,
17.2,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
21.89,
15.9,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
18.91,
16.5,
0.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
15.80,
16.7,
0.34'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
   
11.98,
17.0,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
11.95,
15.3,
0.6'
(P. Dekelver,
0.3-m
Newtonian + CCD;
1.1'
tail in p.a. 146 deg);
   
10.83,
16.4,
0.44'
(S. Shurpakov,
0.2-m
Schmidt-Newtonian + CCD);
143P/Kowal-Mrkos
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
14.05,
21.3,
--
(J. Maikner,
Comet Hunter Observatory 2,
0.305-m
Hyperboloid astro-camera + CCD);
144P/Kushida
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
07.53,
13.7,
2.3'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
05.49,
14.9,
0.5'
(C. Wyatt,
0.4-m
Newtonian);
   
01.77,
16.0,
0.25'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
nov
30.85,
15.2,
0.8'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD);
   
30.49,
15.3,
0.6'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
24.80,
16.0,
--
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD);
   
23.86,
16.5,
--
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD);
   
22.05,
13.2,
5.6'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD);
   
21.86,
15.6,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
21.48,
16.0,
0.4'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
20.93,
17.2,
0.33'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
   
20.76,
16.3,
0.34'
(S. Shurpakov,
0.41-m
Newtonian + CCD);
   
18.93,
15.7,
0.8'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
18.01,
16.5,
--
(G. Pappa,
Piemonte,Italy (remote control),
0.2-m
Ritchey-Chretien + CCD);
   
17.93,
13.6,
0.8'
(W. Kutschera,
0.54-m
Newtonian);
   
15.91,
15.8,
0.7'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
15.89,
14.2,
4.8'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD);
   
13.97,
14.1,
4.3'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD);
   
13.89,
16.1,
0.6'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
12.05,
17.0,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
12.03,
16.1,
0.7'
(P. Dekelver,
0.3-m
Newtonian + CCD);
150P/LONEOS
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
17.26,
18.7,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
12.05,
18.4,
0.3'
(P. Dekelver,
0.3-m
Newtonian + CCD);
158P/Kowal-LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
14.10,
19.9,
--
(J. Maikner,
Comet Hunter Observatory 2,
0.305-m
Hyperboloid astro-camera + CCD);
170P/Christensen
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
21.94,
16.7,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
18.99,
16.7,
0.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
12.07,
17.1,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
207P/NEAT
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
18.89,
19.1,
0.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
18.86,
19.4,
0.4'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD);
   
17.90,
19.3,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
11.03,
19.9,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
209P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
17.21,
20.0,
--
(J. Maikner,
Comet Hunter Observatory 2,
0.305-m
Hyperboloid astro-camera + CCD);
227P/Catalina-LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
13.25,
19.5,
--
(J. Maikner,
Comet Hunter Observatory 2,
0.305-m
Hyperboloid astro-camera + CCD);
237P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
16.87,
18.1,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
13.87,
12.4,
0.6'
(P. Dekelver,
0.3-m
Newtonian + CCD);
242P/Spahr
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
25.86,
19.0,
--
(G. Pappa,
Spain (remote control),
0.5-m
Prime focus of a reflector + CCD);
246P/NEAT
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
14.14,
18.3,
2'
(J. Maikner,
Comet Hunter Observatory 2,
0.305-m
Hyperboloid astro-camera + CCD;
9.5'
tail in p.a. 65 deg);
309P/LINEAR
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
25.87,
19.7,
--
(G. Pappa,
Spain (remote control),
0.5-m
Prime focus of a reflector + CCD);
465P/Hill
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
14.18,
19.3,
--
(J. Maikner,
Comet Hunter Observatory 2,
0.305-m
Hyperboloid astro-camera + CCD);
   
12.10,
19.7,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
471P
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
15.79,
16.7,
0.7'
(P. Dekelver,
0.3-m
Newtonian + CCD;
0.8'
tail in p.a. 79 deg);
   
15.79,
16.2,
1.1'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
1.3'
tail in p.a. 76 deg);
   
13.89,
15.9,
0.7'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
11.89,
17.4,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2014 UN271 (Bernardinelli-Bernstein)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
22.07,
15.9,
1.5'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD);
C/2017 K2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
08.76,
11.2,
0.8'
(O. Miyazaki,
0.32-m
Newtonian);
   
06.91,
12.4,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
05.50,
12.2,
2'
(C. Wyatt,
0.4-m
Newtonian);
   
04.58,
11.8,
1'
(O. Miyazaki,
0.32-m
Newtonian);
nov
24.80,
12.0,
1'
(O. Miyazaki,
0.32-m
Newtonian);
   
23.79,
11.9,
1'
(O. Miyazaki,
0.32-m
Newtonian);
   
23.75,
12.0,
1.3'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
23.15,
12.9,
1.5'
(K. Hills,
0.5-m
Newtonian + CCD);
   
22.79,
12.8,
0.8'
(O. Miyazaki,
0.32-m
Newtonian);
   
22.06,
12.4,
1'
(C. Harder,
Jeersdorf h,
0.298-m
Newtonian);
   
21.97,
12.6,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
   
21.79,
11.9,
0.8'
(O. Miyazaki,
0.32-m
Newtonian);
   
20.79,
11.5,
0.8'
(O. Miyazaki,
0.32-m
Newtonian);
   
20.74,
12.1,
1.4'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
19.79,
11.8,
1'
(O. Miyazaki,
0.32-m
Newtonian);
   
19.03,
12.1,
3'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
18.79,
12.6,
0.8'
(O. Miyazaki,
0.32-m
Newtonian);
   
18.75,
12.2,
1.5'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
17.78,
12.3,
1'
(O. Miyazaki,
0.32-m
Newtonian);
   
16.23,
12.6,
2.07'
(K. Hills,
0.5-m
Newtonian + CCD);
   
16.06,
12.2,
4.7'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.47° tail in p.a. 185 deg);
   
15.78,
12.4,
0.6'
(O. Miyazaki,
0.32-m
Newtonian);
   
15.75,
12.8,
1.2'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
14.79,
11.5,
1.4'
(O. Miyazaki,
0.32-m
Newtonian);
   
13.79,
12.1,
1.1'
(O. Miyazaki,
0.32-m
Newtonian);
   
13.75,
12.4,
1.4'
(K. Harikae,
0.15-m
Newtonian + CCD);
   
12.18,
12.8,
1.69'
(K. Hills,
0.5-m
Newtonian + CCD);
   
12.01,
12.1,
3.7'
(P. Dekelver,
0.3-m
Newtonian + CCD;
2.3'
tail in p.a. 209 deg);
C/2019 U5 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
22.09,
14.0,
1.7'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD;
0.11° tail in p.a. 42 deg);
C/2020 K1 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
05.46,
14.4,
0.7'
(C. Wyatt,
0.4-m
Newtonian);
C/2020 V2 (ZTF)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
05.48,
11.8,
2.5'
(C. Wyatt,
0.4-m
Newtonian;
3.8'
tail in p.a. 46 deg);
nov
18.98,
11.1,
7.8'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD;
0.54° tail in p.a. 36 deg);
   
16.53,
11.0,
2'
(M. Mattiazzo,
Swan Hill, Victoria,
0.28-m
Cassegrain reflector);
C/2020 Y2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
26.76,
17.9,
--
(G. Pappa,
Piemonte,Italy (remote control),
0.2-m
Ritchey-Chretien + CCD);
   
11.99,
17.7,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2021 A9 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
25.01,
18.5,
--
(G. Pappa,
Piemonte,Italy (remote control),
0.3-m
Ritchey-Chretien + CCD);
C/2021 S3 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
25.30,
11.2,
2'
(M. Goiato,
0.22-m
Newtonian);
   
22.08,
11.3,
4.7'
(T. Lehmann,
Hakos (remote),
0.106-m
Refractor + CCD;
0.29° tail in p.a. 245 deg);
C/2021 S4 (Tsuchinshan)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
20.78,
17.6,
0.14'
(S. Shurpakov,
0.41-m
Newtonian + CCD);
   
11.15,
17.5,
0.5'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.6'
tail in p.a. 265 deg);
C/2021 X1 (Maury-Attard)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
02.77,
16.7,
0.7'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
   
01.82,
16.6,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
nov
20.71,
17.3,
0.29'
(S. Shurpakov,
0.41-m
Newtonian + CCD;
0.5'
tail in p.a. 72 deg);
   
18.87,
16.7,
0.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
17.88,
16.9,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
15.86,
16.3,
0.56'
(D. Buczynski,
Tarbatness MPC I81,
0.35-m
Schmidt-Cassegrain + CCD);
   
15.82,
15.8,
1.2'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.23° tail in p.a. 100 deg);
   
15.81,
15.5,
1.5'
(P. Dekelver,
0.3-m
Newtonian + CCD;
13.2'
tail in p.a. 103 deg);
   
15.80,
16.0,
0.36'
(R. Arnold,
Skye, Scotland,
0.2-m
Schmidt-Cassegrain);
   
11.88,
15.9,
0.7'
(P. Dekelver,
0.3-m
Newtonian + CCD;
7.8'
tail in p.a. 102 deg);
   
11.01,
17.1,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2022 A2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
17.86,
17.0,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
15.75,
14.9,
2.3'
(T. Lehmann,
Italy (remote),
0.2-m
Newtonian + CCD;
0.14° tail in p.a. 6 deg);
   
10.96,
17.0,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2022 E2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
19.12,
14.2,
0.8'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
C/2022 JK5 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
05.47,
15.0,
0.4'
(C. Wyatt,
0.4-m
Newtonian);
nov
18.96,
14.8,
2.1'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD;
2'
tail in p.a. 69 deg);
   
15.93,
16.1,
0.56'
(K. Hills,
0.5-m
Newtonian + CCD);
   
12.53,
16.2,
0.3'
(A. Pearce,
0.35-m
Schmidt-Cassegrain + CCD);
   
10.97,
16.1,
0.56'
(K. Hills,
0.5-m
Newtonian + CCD);
   
10.56,
16.2,
0.3'
(A. Pearce,
0.35-m
Schmidt-Cassegrain + CCD);
C/2022 N2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
11.86,
18.2,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2022 QE78 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
19.01,
16.7,
0.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
12.12,
17.1,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2022 S4 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
12.02,
17.4,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2022 U1 (Leonard)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
24.93,
17.0,
--
(G. Pappa,
Piemonte,Italy (remote control),
0.3-m
Ritchey-Chretien + CCD);
C/2022 U3 (Bok)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
23.15,
18.1,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
22.12,
17.4,
0.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
12.15,
18.0,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
   
12.07,
17.5,
0.4'
(P. Dekelver,
0.3-m
Newtonian + CCD);
C/2023 A3 (Tsuchinshan-ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
07.87,
14.7,
0.4'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
nov
28.24,
14.5,
--
(G. van Buitenen,
Dordrecht, NL (G06),
0.203-m
Ritchey-Chretien + CCD);
C/2023 E1 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
18.94,
14.9,
3.2'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD);
   
14.88,
19.3,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2023 H2 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
09.99,
8.9,
8'
(M. Goiato,
20x100
Binoculars);
   
09.98,
9.0,
7'
(M. Goiato,
0.22-m
Newtonian);
   
05.44,
9.4,
5.5'
(C. Wyatt,
0.4-m
Newtonian);
   
04.47,
9.5,
4'
(M. Mattiazzo,
Swan Hill, Victoria,
25x100
Binoculars);
   
02.79,
8.9,
7'
(J. Gonzalez Suarez,
0.203-m
Schmidt-Cassegrain);
nov
27.41,
8.6,
2.4'
(O. Miyazaki,
0.32-m
Newtonian);
   
23.39,
9.5,
3.9'
(O. Miyazaki,
0.32-m
Newtonian);
   
22.39,
9.3,
2.8'
(O. Miyazaki,
0.32-m
Newtonian);
   
21.81,
7.8,
6'
(G. Pappa,
Namibia (remote control),
0.11-m
Refractor + CCD);
   
21.80,
8.4,
11'
(T. Lehmann,
Hakos (remote),
0.2-m
Newtonian + CCD;
0.4° tail in p.a. 70 deg);
   
20.08,
7.5,
6'
(C. Hergenrother,
Tanque Verde, Arizona,
30x125.0
Binoculars);
   
18.77,
7.5,
10'
(J. Navarro Pina,
La Laguna ( Parque Natural Carrascoy , Murcia , Spain ),
20x80
Binoculars);
   
18.68,
7.6,
7'
(T. Karhula,
Virsbo, Sweden,
25x100
Binoculars);
   
18.65,
8.0,
5'
(V. Bespalov,
Moscow region, Ruza district,
0.2-m
Newtonian);
   
18.39,
7.4,
10'
(O. Miyazaki,
11x80
Binoculars);
   
17.80,
7.5,
12'
(J. Navarro Pina,
El Valle ( Murcia , Spain ),
20x80
Binoculars);
   
17.76,
7.8,
10.2'
(W. Kutschera,
0.13-m
Newtonian);
   
17.73,
8.1,
7'
(C. Harder,
Jeersdorf f,
0.298-m
Newtonian);
   
17.39,
7.4,
8.2'
(O. Miyazaki,
11x80
Binoculars);
   
16.98,
7.5,
10'
(M. Goiato,
20x100
Binoculars);
   
16.80,
8.0,
5'
(M. Deconinck,
Artignosc-sur-Verdon, Provence, France,
0.25-m
Schmidt reflector);
   
16.77,
7.5,
14'
(D. Heggie,
ASERO, Trevinca, Spain,
0.094-m
Refractor + CCD;
9'
tail in p.a. 73 deg);
   
16.77,
6.3,
18'
(J. Gonzalez Suarez,
10x50
Binoculars);
   
16.45,
7.0,
9'
(M. Mattiazzo,
Swan Hill, Victoria,
8x40
Binoculars);
   
15.90,
7.4,
13'
(J. Navarro Pina,
Sierra de Carrascoy ( Murcia , Spain ),
20x80
Binoculars);
   
15.81,
7.2,
15'
(J. Navarro Pina,
Puerto de la Cadena ( Murcia , Spain ),
20x80
Binoculars);
   
15.79,
7.0,
6'
(P. De Schrijver,
Beert,
15x80
Binoculars);
   
15.76,
7.0,
11'
(V. Gonano,
Udine, Italy,
10x50
Binoculars);
   
15.75,
7.4,
10'
(M. Deconinck,
Artignosc-sur-Verdon, Provence, France,
0.15-m
Refractor);
   
15.72,
7.4,
16'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD);
   
15.72,
8.0,
12.8'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
15.46,
6.7,
12'
(M. Mattiazzo,
Swan Hill, Victoria,
8x40
Binoculars);
   
15.39,
7.2,
18'
(O. Miyazaki,
7x50
Binoculars);
   
15.12,
6.9,
31'
(T. Lehmann,
Utah (remote),
0.106-m
Refractor + CCD;
0.74° tail in p.a. 67 deg);
   
14.92,
6.8,
8'
(J. de Souza Aguiar,
25x100
Binoculars);
   
14.86,
6.8,
16'
(V. Díaz,
La Romana, Alicante, Spain,
15x65.0
Binoculars);
   
14.84,
7.5,
14.3'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
14.74,
6.8,
10'
(M. Deconinck,
Artignosc-sur-Verdon, Provence, France,
0.152-m
Refractor);
   
14.74,
6.6,
12'
(P. Guzik,
10x42.0
Binoculars);
   
14.40,
6.5,
12'
(C. Wyatt,
0.05-m
Refractor);
   
14.39,
7.0,
10'
(O. Miyazaki,
7x50
Binoculars);
   
13.93,
6.6,
8'
(J. de Souza Aguiar,
25x100
Binoculars);
   
13.85,
7.2,
15.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);
   
13.85,
6.6,
13.91'
(K. Hills,
0.5-m
Newtonian + CCD);
   
13.84,
7.8,
11'
(P. Dekelver,
0.3-m
Newtonian + CCD);
   
13.81,
7.0,
12'
(C. Harder,
Jeersdorf f,
0.252-m
Newtonian);
   
13.78,
7.1,
15'
(J. Navarro Pina,
Puerto de la Cadena ( Murcia , Spain ),
20x80
Binoculars);
   
13.76,
6.6,
15'
(A. Scholten,
Bussloo,
15x80
Binoculars);
   
13.75,
7.1,
12'
(V. Kasten,
15x50
Binoculars);
   
13.75,
>6.6,
7'
(D. Hennig,
West Kelowna, BC - visiting. (NELM 5.0),
15x50
Binoculars;
21'
tail in p.a. 90 deg);
   
13.74,
6.4,
14'
(P. Guzik,
10x42.0
Binoculars);
   
13.73,
6.5,
15'
(G. Pappa,
Pedara,Sicily,Italy,
Nonex50
Binoculars);
   
13.72,
6.7,
8'
(G. Pappa,
Pedara,Sicily,Italy,
0.3-m
Camera lens + CCD);
   
13.71,
6.1,
15'
(M. Paradowski,
0.034-m
Camera lens + CCD);
   
13.68,
6.9,
16'
(J. Powichrowski,
Knyszyn,
7x50
Binoculars);
   
13.40,
8.1,
9'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
13.40,
8.9,
1.2'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
13.40,
7.0,
10.5'
(K. Yoshimoto,
0.203-m
Ritchey-Chretien + CCD);
   
13.06,
6.4,
14'
(C. Hergenrother,
Tanque Verde, Arizona,
10x50
Binoculars);
   
13.02,
6.8,
13.5'
(D. Zubenel,
Linn County, Kansas. USA,
0.108-m
Newtonian);
   
12.96,
6.3,
18'
(M. Goiato,
7x50
Binoculars);
   
12.95,
6.4,
10'
(W. Souza,
20x80
Binoculars);
   
12.95,
6.5,
15'
(M. Goiato,
20x100
Binoculars);
   
12.93,
6.5,
12'
(J. de Souza Aguiar,
25x100
Binoculars);
   
12.92,
5.9,
23'
(J. Gonzalez Suarez,
Demues - Onis, Asturias, Spain,
10x50
Binoculars);
   
12.78,
6.9,
10'
(M. Biely,
Czech Republic, Brno,
20x80
Binoculars);
   
12.77,
7.1,
16.5'
(J. Navarro Pina,
Puerto de la Cadena ( Murcia , Spain ),
20x80
Binoculars);
   
12.77,
7.0,
13'
(V. Kasten,
15x50
Binoculars);
   
12.76,
7.0,
11'
(C. Harder,
Jeersdorf f,
0.198-m
Newtonian);
   
12.75,
7.5,
--
(A. Russo,
Gibraltar,
15x50
Binoculars);
   
12.46,
7.7,
7.8'
(Y. Yamaguchi,
0.076-m
Refractor + CCD);
   
12.46,
6.5,
15'
(M. Mattiazzo,
Swan Hill, Victoria,
8x40
Binoculars);
   
12.43,
7.4,
12.1'
(Y. Yamaguchi,
0.076-m
Refractor + CCD);
   
11.94,
6.2,
15'
(M. Goiato,
7x50
Binoculars);
   
11.87,
8.6,
7.3'
(P. Dekelver,
0.3-m
Newtonian + CCD;
13.7'
tail in p.a. 60 deg);
   
11.86,
6.0,
22'
(P. Pérez Corujo,
La Lechuza. Vega de San Mateo. Gran Canaria,
20x80
Binoculars);
   
11.82,
6.5,
15'
(G. Pappa,
Pedara,Sicily,
0.3-m
Camera lens + CCD);
   
11.80,
6.9,
10'
(J. Navarro Pina,
Sierra de Carrascoy ( Murcia , Spain ),
20x80
Binoculars);
   
11.78,
6.8,
10'
(G. Pappa,
Pedara,Sicily,
12x50
Binoculars);
   
11.76,
6.3,
10'
(M. Deconinck,
Artignosc-sur-Verdon, Provence, France,
0.152-m
Refractor);
   
11.75,
7.6,
9.96'
(N. James,
0.28-m
Schmidt-Cassegrain + CCD);
   
11.75,
6.9,
17.48'
(N. James,
0.072-m
Refractor + CCD);
   
11.75,
6.6,
27'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD);
   
11.72,
6.8,
15'
(A. Scholten,
Bussloo,
15x80
Binoculars);
   
11.44,
6.7,
15'
(J. Pile,
San Rafael, Bulacan,
0.06-m
"small telescopes and finders" with aperture not exceeding 4 inches);
   
11.07,
6.1,
15'
(C. Hergenrother,
10x50
Binoculars);
   
11.05,
6.2,
16'
(D. Zubenel,
Hoyt, Kansas, USA,
0.108-m
Newtonian);
   
10.81,
6.9,
11'
(V. Díaz,
La Romana, Alicante, Spain,
20x80
Binoculars);
   
10.77,
6.7,
--
(J. Chambó Bris,
Valles, Valencia, Spain,
0.2-m
Newtonian + CCD);
   
10.73,
9.9,
3.3'
(S. Shurpakov,
0.2-m
Schmidt-Newtonian + CCD);
C/2023 P1 (Nishimura)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
08.80,
15.2,
1.3'
(A. Pearce,
Nedlands, W. Australia,
0.35-m
Schmidt-Cassegrain + CCD;
0.04° tail in p.a. 81 deg);
nov
22.13,
11.5,
2'
(G. Pappa,
Namibia (remote control),
0.11-m
Refractor + CCD;
8'
tail);
   
22.09,
10.6,
6.5'
(T. Lehmann,
Hakos (remote),
0.106-m
Refractor + CCD;
1.22° tail in p.a. 86 deg);
   
13.32,
11.3,
4.1'
(M. Mašek,
0.107-m
Camera lens + CCD;
10.4'
tail in p.a. 87 deg);
   
13.32,
9.8,
7.2'
(M. Mašek,
0.107-m
Camera lens + CCD;
8.8'
tail in p.a. 86 deg);
C/2023 R2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
12.03,
17.6,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
C/2023 S2 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
20.70,
18.5,
0.34'
(S. Shurpakov,
0.41-m
Newtonian + CCD);
   
15.77,
14.0,
2'
(S. Fritsche,
Koeditz,
0.1-m
Refractor + CCD);
   
13.73,
13.5,
--
(G. Pappa,
Pedara,Sicily,Italy,
0.3-m
Camera lens + CCD);
C/2023 S3 (Lemmon)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
dec
05.45,
14.6,
0.6'
(C. Wyatt,
0.4-m
Newtonian);
   
04.51,
14.7,
1'
(M. Mattiazzo,
Swan Hill, Victoria,
0.28-m
Schmidt reflector + CCD);
nov
18.84,
16.2,
--
(G. Pappa,
Namibia (remote control),
0.2-m
Newtonian + CCD);
C/2023 V5 (Leonard)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
17.71,
17.5,
--
(G. Pappa,
Piemonte,Italy (remote control),
0.3-m
Ritchey-Chretien + CCD);
P/2023 M4 (ATLAS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
10.91,
18.1,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
P/2023 S1
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
13.98,
18.8,
0.38'
(K. Hills,
0.5-m
Newtonian + CCD);
P/2023 V2 (PANSTARRS)
Total-magnitude and coma-diameter estimates (visual unless otherwise noted):
2023
nov
18.97,
16.9,
0.4'
(P. Carson,
PGC Observatory Z10, Fregenal de la sierra, Spain,
0.315-m
Cassegrain reflector + CCD);