Periodic comet 67P/Churyumov-Gerasimenko
Image of periodic comet 67P/Churyumov-Gerasimenko, obtained on 2021 Sep. 14 (3h09-3h17UT) with 60-cm, f/3.3 Deltagraph telescope and CCD. Image is a composition 12x30 second unfiltered exposures.
Copyright © 2021 by H. Mikuz, Črni Vrh Observatory.
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Light-curve of C/2019 L3 (ATLAS) (Nov 13, 2021).
| Type | Comet name | Obs date | Mag | App | T | Pow | Dia | DC | Tail | PA | Obs |
|---|---|---|---|---|---|---|---|---|---|---|---|
| V | C/2021 A1 | 2021 11 13.50 | 8.5 | 5.0 | B | 10 | 6 | 4 | HER02 | ||
| V | C/2021 A1 | 2021 11 13.50 | 8.9 | 12.5 | B | 30 | 5 | 6 | 5.0m | 320 | HER02 |
| C | 29P | 2021 11 12.85 | 10.9 | 35.0 | T | a480 | 3.57 | BUCaa | |||
| V | 67P | 2021 11 12.18 | 8.6: | 25.4 | T | 96 | 2.9 | 4 | 2.4m | 277 | COLac |
| V | 67P | 2021 11 11.98 | 9.0 | 20.3 | T | 50 | 3.9 | s5 | KAM01 | ||
| V | C/2019 L3 | 2021 11 11.96 | 9.6 | 20.3 | T | 50 | 2.8 | s5 | KAM01 | ||
| C | 29P | 2021 11 11.94 | 10.5 | 28.0 | T | A410 | 4.89 | JAMaa | |||
| V | C/2017 K2 | 2021 11 11.72 | 12.1 | 44.0 | L | 200 | 0.8 | 4 | HAS02 | ||
| V | C/2021 A1 | 2021 11 11.51 | 9.4 | 12.5 | B | 30 | 5 | 5 | HER02 | ||
| V | C/2021 A1 | 2021 11 11.22 | 8.7 | 10.0 | B | 25 | 8 | 3 | 0.4 | 320 | GON05 |
| V | C/2021 A1 | 2021 11 11.21 | 9.2 | 20.3 | T | 77 | 6 | 3/ | 0.3 | 320 | GON05 |
| V | 4P | 2021 11 11.17 | 11.0 | 20.3 | T | 100 | 3 | 2/ | GON05 | ||
| V | C/2019 L3 | 2021 11 11.13 | 9.6 | 20.3 | T | 77 | 4 | 5 | GON05 | ||
| V | 67P | 2021 11 11.11 | 9.2 | 10.0 | B | 25 | 4 | 5/ | GON05 | ||
| V | 67P | 2021 11 11.10 | 9.8 | 20.3 | T | 77 | 4 | 5 | 0.25 | 280 | GON05 |
| V | 29P | 2021 11 11.09 | 10.1 | 20.3 | T | 77 | 5 | 3 | GON05 | ||
| V | C/2021 A1 | 2021 11 11.06 | 9.2 | 5.0 | B | 10 | 6 | 4 | GUZ | ||
| V | 29P | 2021 11 11.05 | 10.8 | 10.0 | B | 25 | & 5 | 1 | GUZ | ||
| V | C/2019 L3 | 2021 11 11.04 | 9.8 | 10.0 | B | 25 | 4 | 5 | GUZ | ||
| V | 67P | 2021 11 11.03 | 8.9 | 5.0 | B | 10 | 5 | 5 | GUZ |
| Comet name | Mag | Trend | Observable | Visiblity 45N |
Visiblity 45S |
|---|---|---|---|---|---|
| C/2021 A1 (Leonard) | 9.0 | bright | 90N to 56S | Best morning | Early evening |
| 67P/Churyumov-Gerasimenko | 9.5 | steady | 90N to 63S | Best morning | Early evening |
| 342P/SOHO | 9.5 | fade | 65N to 90S | Poor elongation | Poor elongation |
| C/2019 L3 (ATLAS) | 10.0 | bright | 90N to 51S | Best morning | Early evening |
| 29P/Schwassmann-Wachmann | 10.5 | steady | 90N to 58S | Best morning | Best morning |
| 8P/Tuttle | 11.0 | fade | 45N to 90S | Early evening | All night |
| 19P/Borrelly | 11.0 | bright | 43N to 90S | Never up | Never up |
| 4P/Faye | 11.5 | steady | 90N to 80S | Best morning | Best morning |
| 73P-V/Schwassmann-Wachmann | 12.0 | fade | 62N to 90S | Early evening | Evening |
| C/2017 K2 (PANSTARRS) | 12.0 | bright | 90N to 71S | Evening | Early evening |
| 57P/du Toit-Neujmin-Delporte | 12.5 | fade | 70N to 90S | Evening | Evening |
| 97P/Metcalf-Brewington | 13.0 | steady | 86N to 90S | Best evening | Best morning |
| 83D/Russell | 13.5 | bright | 71N to 90S | Early evening | Early evening |
| P/2013 PA104 (PANSTARRS) | 13.5 | fade | 84N to 90S | Best evening | Best evening |
| C/2019 T4 (ATLAS) | 13.5 | bright | 63N to 90S | Early evening | Best morning |
| 181P/Shoemaker-Levy | 14.0 | bright | 54N to 90S | Early evening | Best evening |
| 132P/Helin-Roman-Alu | 14.0 | fade | 87N to 90S | Best evening | Best morning |
The observable region is an approximate indication of the latitude at which the comet may be seen. The period when visible is calculated for latitude 45°N and 45°S.
CBET 5064 & MPEC 2021-V21, issued on 2021, November 02, announce the discovery of a new comet (magnitude ~19) by A. Maury and G. Attard on CCD images taken on October 24.3 UT with the 0.28-m f/2.2 Rowe-Ackermann Schmidt astrograph at San Pedro de Atacama, Chile in the course of the MAP (W94) survey. The new comet has been designated P/2021 U3 (Attard-Maury). This is the 4th amateur comet discovery of 2021. It is also the second comet discovered using the synthetic tracking technique (using TYCHO software).
A new article proposes that space probes could hitch a ride with 'centaurs' as they become comets. Along the way, the spacecraft would gather data that would otherwise be impossible to record -- including how comets, Earth-like planets, and even the solar system formed.
CBET 5029 & MPEC 2021-R98 , issued on 2021, September 06, announce the discovery of a new comet (magnitude ~17) on CCD images taken on August 29.6 UT with a 0.5-m f/2 Schmidt reflector at Haleakala, Hawaii, in the course of the "Asteroid Terrestrial-Impact Last Alert System" (ATLAS) search program. The new comet has been designated P/2021 Q5 (ATLAS).
CBET 5028 & MPEC 2021-Q102, issued on 2021, August 31 & September 02, announce the discovery of a new comet (magnitude ~20) on CCD images taken on August 26.2 UT with the Mt. Lemmon Survey (G96) 1.5-m reflector. The new comet has been designated C/2021 Q4 (Fuls).
With the MPEC 2021-Q42 issued on 21 August 2021, the discovery of a new Magn comet is announced. 19.4 identified by the ATLAS-HKO program (T05).
