C/2019 L3 (ATLAS)
Unfiltered image of comet C/2019 L3 (ATLAS), obtained on 2021 Feb. 17 (19h31-19h43UT) with 60-cm, f/3.3 Deltagraph telescope and CCD. Exposure time was 10x60 seconds. Total exposure time 10 minutes.
Copyright © 2021 by H. Mikuz, Črni Vrh Observatory.
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Light-curve of C/2020 T2 (Palomar) (May 16, 2021).
| Type | Comet name | Obs date | Mag | App | T | Pow | Dia | DC | Tail | PA | Obs |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | C/2021 A1 | 2021 05 15.95 | 17.1 | 50.0 | L | a600 | 0.4 | HILaa | |||
| V | C/2020 T2 | 2021 05 15.90 | 10.6 | 25.2 | L | 68 | 3 | 3 | HAR11 | ||
| C | 99P | 2021 05 15.89 | 17.6 | 31.5 | C | a840 | 0.4 | CARah | |||
| V | C/2020 R4 | 2021 05 15.03 | 11.7 | 54.0 | L | 120 | 2.1 | 3 | KUT | ||
| V | C/2020 T2 | 2021 05 14.99 | 10.7 | 25.0 | L | 60 | 2.8 | 5 | KUT | ||
| C | C/2017 K2 | 2021 05 14.95 | 14.2 | 20.0 | L | B400 | 2 | LOSaa | |||
| V | C/2020 R4 | 2021 05 14.93 | 10.4: | 25.2 | L | 78 | 2.5 | 2 | HAR11 | ||
| C | C/2020 T2 | 2021 05 14.91 | 11.2 | 20.0 | L | B400 | 9.2 | LOSaa | |||
| V | C/2020 T2 | 2021 05 14.88 | 10.1 | 7.0 | B | 16 | 3.5 | 6 | PIL01 | ||
| C | C/2018 N2 | 2021 05 14.88 | 16.3 | 50.0 | L | a600 | 0.4 | HILaa | |||
| V | C/2020 R4 | 2021 05 14.87 | 10.0 | 7.0 | B | 16 | 4.5 | PIL01 | |||
| C | C/2020 R4 | 2021 05 14.86 | 11.8 | 20.0 | L | B400 | 10.1 | LOSaa | |||
| C | C/2018 U1 | 2021 05 14.20 | 14.7 | 50.0 | L | a600 | 0.4 | HILaa | |||
| C | 246P | 2021 05 14.19 | 13.3 | 50.0 | L | a600 | 0.8 | HILaa | |||
| C | C/2020 H6 | 2021 05 14.04 | 15.6 | 50.0 | L | a360 | 0.4 | HILaa | |||
| C | 117P | 2021 05 14.02 | 15.5 | 50.0 | L | a600 | 0.4 | HILaa | |||
| C | C/2020 Y2 | 2021 05 14.01 | 15.8 | 50.0 | L | a600 | 0.4 | HILaa | |||
| C | C/2019 C1 | 2021 05 14.00 | 17.2 | 50.0 | L | a600 | 0.4 | HILaa | |||
| C | C/2021 C4 | 2021 05 13.99 | 16.9 | 50.0 | L | A080 | 0.4 | HILaa | |||
| V | C/2019 F1 | 2021 05 13.73 | 15.1 | 40.0 | L | 261 | 0.5 | 6 | WYA |
| Comet name | Mag | Trend | Observable | Visiblity 45N |
Visiblity 45S |
|---|---|---|---|---|---|
| C/2020 T2 (Palomar) | 11.0 | bright | 90N to 61S | Best morning | Best morning |
| C/2020 R4 (ATLAS) | 11.0 | fade | 90N to 63S | Best morning | Best evening |
| C/2019 L3 (ATLAS) | 12.0 | bright | 90N to 39S | All night | Never up |
| 6P/dArrest | 12.0 | bright | 90N to 74S | Best morning | Best morning |
| C/2020 F8 (SWAN) | 12.0 | steady | 84N to 90S | Early evening | Evening |
| 7P/Pons-Winnecke | 12.5 | bright | 88N to 90S | Best morning | Best morning |
| C/2020 X3 (SOHO) | 12.5 | fade | 68N to 90S | Evening | Best evening |
| C/2020 J1 (SONEAR) | 13.5 | steady | 60N to 90S | Best morning | Best morning |
| P/2013 PA104 (PANSTARRS) | 13.5 | fade | 84N to 90S | Best evening | Best evening |
| 15P/Finlay | 13.5 | bright | 78N to 90S | Early evening | Early evening |
| C/2017 K2 (PANSTARRS) | 13.5 | bright | 90N to 47S | Best morning | Early evening |
| 29P/Schwassmann-Wachmann | 14.0 | steady | 90N to 63S | Poor elongation | Poor elongation |
| C/2021 D1 (SWAN) | 14.0 | fade | 90N to 58S | Evening | Early evening |
| 246P/NEAT | 14.0 | bright | 63N to 90S | Early evening | Best morning |
| 28P/Neujmin | 14.0 | fade | 90N to 75S | Early evening | Early evening |
| C/2020 K5 (PANSTARRS) | 14.0 | bright | 44N to 90S | Never up | Never up |
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.
New reference catalog keys were assigned for GAIA DR catalog and APASS catalog.
CBET xxxx & MPEC 2021-J71 , issued on 2021, May 06, announce the discovery of an apparently asteroidal object (magnitude ~19.5) on CCD images taken on March 09.5 UT with the 1.2-m Schmidt telescope at Palomar in the course of the "Zwicky Transient Facility" (ZTF) search program. This object has been found to show cometary appearance by CCD astrometrists elsewhere. The new comet has been designated C/2021 E3 (ZTF).
The world's first ground-based observations of the bare nucleus of a comet nearing the end of its active life revealed that the nucleus has a diameter of 800 meters and is covered with large grains of phyllosilicate; on Earth large grains of phyllosilicate are commonly available as talcum powder. This discovery provides clues to piece together the history of how this comet evolved into its current burnt-out state.
CBET 4953 & MPEC 2021-G80, issued on 2021, April 07, announce that an apparently asteroidal object (magnitude ~21.0) discovered on CCD images obtained with the F51 Pan-STARRS 1 survey's 1.8m Ritchey-Chretien on 2019, October 22.22 and designated A/2019 U5 (cf. MPEC 2019-V10) has been found to show cometary appearance by other CCD observers over the past half year. The new comet has been designated C/2019 U5 (PANSTARRS).
New observations indicate that the rogue comet 2I/Borisov, which is only the second and most recently detected interstellar visitor to our Solar System, is one of the most pristine ever observed. Astronomers suspect that the comet most likely never passed close to a star, making it an undisturbed relic of the cloud of gas and dust it formed from.
CBET 4949 & MPEC 2021-F110, issued on 2021, March 25, announce that an apparently asteroidal object (magnitude ~21.0) discovered on CCD images obtained with the Mt. Lemmon Survey's 1.5-m reflector on 2020 Mar. 22 and designated A/2020 F7 (cf. MPEC 2020-G78) has been found to show cometary appearance by numerous other CCD observers over the past half year. The new comet has been designated C/2020 F7 (Lemmon).
