Comet C/2010 U3 (Boattini)
False color unfiltered image of comet C/2010 U3 (Boattini), obtained on 2019 Jun. 2 (21h32-21h40UT) with 60-cm, f/3.3 Deltagraph telescope and CCD. Exposure time was 6x60 seconds.
Copyright © 2019 by H. Mikuz, Črni Vrh Observatory.
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Amateur astronomers can make valuable contributions to comet science by observing comets and submitting their observations to COBS as professional astronomers typically do not have telescope time required to acquire regular observations. We therefore encourage comet observers worldwide to submit their observations and contribute to the COBS database.
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Light-curve of C/2018 Y1 (Iwamoto) (Jun 19, 2019).
| Type | Comet name | Obs date | Mag | App | T | Pow | Dia | DC | Tail | PA | Obs |
|---|---|---|---|---|---|---|---|---|---|---|---|
| C | C/2015 V2 | 2019 06 12.39 | 16.9 | 30.0 | C | C840 | 0.5 | MAS01 | |||
| C | 68P | 2019 06 12.30 | 15.6 | 30.0 | C | a840 | 0.4 | MAS01 | |||
| C | 68P | 2019 06 12.30 | 16.1 | 30.0 | C | a840 | 0.4 | MAS01 | |||
| C | C/2018 N2 | 2019 06 12.20 | 13.1 | 50.0 | T | a 60 | 0.3 | 7 | 2.6m | 186 | PAUaa |
| V | C/2018 R3 | 2019 06 11.89 | 10.3 | 20.0 | T | 50 | 4 | 2 | LAB02 | ||
| C | C/2017 B3 | 2019 06 10.37 | 14.8 | 30.0 | C | a720 | 0.7 | MAS01 | |||
| C | C/2017 B3 | 2019 06 10.37 | 14.4 | 30.0 | C | a720 | 0.7 | 0.7m | 219 | MAS01 | |
| C | 260P | 2019 06 09.34 | 16.9 | 30.0 | C | B760 | 0.4 | 0.8m | 241 | MAS01 | |
| C | C/2016 R2 | 2019 06 08.89 | 14.1 | 50.0 | L | a150 | 0.9 | HILaa | |||
| C | C/2018 U1 | 2019 06 08.01 | 18.4 | 50.0 | L | a150 | 0.2 | HILaa | |||
| V | C/2018 R3 | 2019 06 07.94 | 8.5 | 10.0 | B | 25 | 10 | 2 | GON05 | ||
| C | 74P | 2019 06 07.94 | 16.3 | 50.0 | L | a150 | 0.4 | HILaa | |||
| V | C/2018 R3 | 2019 06 07.93 | 9.3 | 20.3 | T | 77 | 6 | 2/ | GON05 | ||
| C | 29P | 2019 06 07.21 | 13.0 | 50.0 | L | a150 | 2.8 | HILaa | |||
| C | C/2017 K2 | 2019 06 07.00 | 16.0 | 50.0 | L | a180 | 0.4 | HILaa | |||
| C | C/2019 D1 | 2019 06 06.02 | 14.4 | 10.0 | R | B642 | 2.2 | 0.04 | 254 | FRIaa | |
| C | 68P | 2019 06 06.02 | 15.2 | 50.0 | L | a150 | 0.4 | HILaa | |||
| C | 68P | 2019 06 05.98 | 15.5 | 10.0 | R | B883 | 1.3 | 0.01 | 234 | FRIaa | |
| C | C/2016 R2 | 2019 06 05.94 | 15.2 | 10.0 | R | B883 | 2.6 | FRIaa | |||
| V | C/2018 R3 | 2019 06 05.90 | 10.2 | 10.0 | B | 25 | 3 | 4 | GUZ |
| Comet name | Mag | Trend | Observable | Visiblity 45N |
Visiblity 45S |
|---|---|---|---|---|---|
| C/2018 R3 (Lemmon) | 10.5 | fade | 90N to 38S | All night | Never up |
| C/2017 T2 (PANSTARRS) | 12.5 | bright | 90N to 75S | Early evening | Early evening |
| C/2016 M1 (PANSTARRS) | 13.0 | fade | 60N to 90S | Early evening | Evening |
| 29P/Schwassmann-Wachmann | 13.0 | steady | 90N to 76S | Early evening | Early evening |
| P/2008 Y12 (SOHO) | 13.5 | bright | 60N to 90S | Best morning | Best morning |
| C/2008 Y12 (SOHO) | 13.5 | bright | 60N to 90S | Best morning | Best morning |
| C/2017 M4 (ATLAS) | 13.5 | fade | 47N to 90S | Early evening | Best morning |
| C/2018 N2 (ASASSN) | 13.5 | bright | 90N to 84S | Early evening | Early evening |
| C/2018 W2 (Africano) | 13.5 | bright | 90N to 28S | All night | Never up |
| C/2018 A6 (Gibbs) | 14.0 | steady | 37N to 90S | Never up | Never up |
| 68P/Klemola | 14.0 | bright | 86N to 90S | Best morning | Best evening |
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.
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CBET 4625 & MPEC 2019-J122, issued on 2019, May 12, announce the discovery of a comet (magnitude ~17.5) in the course of the "Mt. Lemmon Survey" (G96), in images taken on 2019, May 04 with a 1.5-m reflector + 10K CCD. This object was reported as a comet by R. A. Kowalski and D. Rankin (G96, May 4). The new comet has been designated C/2019 J1 (Lemmon).
