Latest image

Comet C/2017 T2 (PANSTARRS)
True color image of comet C/2017 T2 (PANSTARRS), obtained on 2019 Oct. 31 with APO 106/530 and PL11002 CCD (ITelescope, New Mexico). Exposure time was 3x600sec.
Copyright © 2019 by Rolando Ligustri

Welcome to COBS!

Comet Observation database (COBS) saw first light in 2010 and is maintained by Crni Vrh Observatory. It is a free and unique service for comet observers worldwide which allows submission, display and analysis of comet data in a single location.

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.

Registered observers may submit observations using a web based form which which stores the observations in an SQL database and stores them in ICQ format. Observations may be queried and plotted in the web site or exported for further processing, analysis and publication. The database currently contains more than 242000 comet observations of more than 1300 different comets and represents the largest available database of comet observations.

The data stored in COBS is freely available to everyone who honors our data usage policy. Please cite COBS as the reference if you use it for comet studies.

Latest lightcurve

Light-curve of C/2017 T2 (PANSTARRS) (Nov 20, 2019).

Type Comet name Obs date Mag App T Pow Dia DC Tail PA Obs
V C/2018 N2 2019 11 20.95 11.3 25.4 T 96 2.3 2/ COLac
V C/2017 T2 2019 11 20.94 10.7 25.4 T 96 1.9 4 COLac
V C/2017 T2 2019 11 20.91 10.2 30.0 L 120 3 3 VAN16
V C/2018 A6 2019 11 19.45 14.7 40.0 L 261 0.4 5/ WYA
V C/2018 W2 2019 11 19.44 13.1 40.0 L 108 1.3 3/ WYA
V C/2017 B3 2019 11 19.43 14.7 40.0 L 261 0.5 3/ WYA
V 29P 2019 11 19.42 14.7 40.0 L 108 0.9 1 WYA
V C/2018 N2 2019 11 19.41 12.4 40.0 L 108 1 5/ WYA
V C/2018 N2 2019 11 18.93 11.2 20.3 T 133 2 3/ GON05
V 260P 2019 11 18.90 11.3 20.3 T 167 1 5 GON05
V C/2017 T2 2019 11 18.86 11.1 32.0 L 80 1.6 7 0.08 208 PIL01
V C/2017 T2 2019 11 18.85 9.3 20.3 T 100 6 2 GON05
V C/2017 T2 2019 11 18.81 9.7 25.4 T 96 1.9 3 COLac
V 260P 2019 11 18.81 11.6 32.0 L 80 1.5 PIL01
V C/2018 N2 2019 11 18.80 10.1 25.4 T 96 2.2 4 COLac
V C/2018 N2 2019 11 18.79 10.9 32.0 L 80 2.5 PIL01
C C/2019 L3 2019 11 18.76 16.9 10.0 R C127 0.5 FRIaa
C 260P 2019 11 18.73 12.1 10.0 R a962 4.5 0.1 211 FRIaa
V 114P 2019 11 18.72 15.1 60.0 L 406 0.4 4 SZA
C C/2018 N2 2019 11 18.71 11.9 10.0 R A443 5.4 0.16 150 FRIaa

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Comet Observing Planner

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Current comet magnitudes and observable region

Comet name Mag Trend Observable Visiblity
45N
Visiblity
45S
C/2017 T2 (PANSTARRS) 10.5 bright 90N to 47S Best morning Best morning
C/2018 N2 (ASASSN) 11.5 fade 90N to 51S Best evening Evening
260P/McNaught 12.5 fade 90N to 40S All night Never up
C/2008 Y12 (SOHO) 12.5 bright 56N to 90S Best morning Best morning
29P/Schwassmann-Wachmann 13.0 steady 90N to 76S Best evening Best evening
C/2018 W2 (Africano) 13.5 fade 47N to 90S Evening Best morning
155P/Shoemaker 14.0 bright 90N to 76S Best morning Early evening
114P/Wiseman-Skiff 14.0 bright 90N to 48S Best morning Evening
68P/Klemola 14.0 fade 74N to 90S Evening 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.

Latest news

Oct. 17, 2019

Hubble observes new Interstellar Visitor [HEIC1918]

On 12 October 2019, the NASA/ESA Hubble Space Telescope provided astronomers with their best look yet at an interstellar visitor – Comet 2I/Borisov – which is believed to have arrived here from another planetary system elsewhere in our galaxy.

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Sep. 27, 2019

Naming of new interstellar visitor: 2I/Borisov

A new object from interstellar space has been found within the Solar System, only the second such discovery of its kind. Astronomers are turning their telescopes towards the visitor, which offers a tantalising glimpse beyond our Solar System and raises some puzzling questions. The object has been given the name 2I/Borisov by the IAU.

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Sep. 14, 2019

Astronomers May Have Found an Interstellar Comet. Here's Why That Matters.

It’s looking likely that a newly discovered comet is actually an interstellar interloper from beyond our solar system. Since its discovery on 30 August, more and more measurements of C/2019 Q4 (Borisov)—named after the amateur astronomer from Crimea who found it—indicate it isn’t orbiting our Sun. Even NASA now says the comet’s extrasolar origin is promising.

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Sep. 14, 2019

Interstellar 2.0

Astronomers have spotted an object that looks likely to be a very rare visitor from outside our Solar System. If confirmed, this unusual body would be only the second interstellar object ever detected passing through our neighbourhood.

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Sep. 12, 2019

A possible interstellar comet

A new comet just discovered by amateur astronomer Gennady Borisov is rocketing through the solar system too fast for the sun's gravity to hang onto it. Indeed, it appears to be a visitor from the stars. Interstellar Comet Borisov will make its closest approach to the sun and to Earth in Dec. 2019.

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