Latest image

Comet C/2020 F8 (Swan)
Comet C/2020 F8 (Swan) obtained on 2020 May. 15.20UT from Abu Dhabi, UAE with 102mm APO Refractor and CCD. Exposure time was 16x30s.
Copyright © 2020 by Mohammad Odeh and Khalfan Alnoimy. International Astronomical Center (IAC).

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 251000 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/2020 F3 (NEOWISE) (Jul 04, 2020).

Type Comet name Obs date Mag App T Pow Dia DC Tail PA Obs
V 2P 2020 07 04.44 7.4 20.0 L 45 1 7 PEA
V C/2020 F3 2020 07 04.13 1.7: 5.0 B 10 & 5 7 &20.0m 300 DECaa
V C/2020 F3 2020 07 04.12 1.7: 12.6 B 40 7 &15.0m 300 DECaa
V C/2020 F3 2020 07 04.12 1.7: 12.6 B 25 7 &17.0m 300 DECaa
V C/2020 F3 2020 07 04.10 0.0: 6.3 B 9 8 0.25 300 KAM01
V C/2020 F3 2020 07 04.07 2.2: 60.0 B 20 & 0.5 S8 & 0.1 300 DRAac
V C/2020 F3 2020 07 03.49 1.4: 5.0 B 10 & 1 7 0.3 300 HER02
V 2P 2020 07 03.43 7.3 20.0 L 45 1 8 PEA
V C/2019 U6 2020 07 03.37 7.6 7.0 B 15 9 4/ WYA
V C/2020 F3 2020 07 03.16 2.5: 20.3 T 77 0.3 8 0.1 290 GON05
V C/2020 F3 2020 07 03.13 1.5: 5.0 B 10 8 300 DECaa
V C/2020 F3 2020 07 03.12 1.5: 12.6 B 40 & 5 D7 &15.0m 300 DECaa
V 58P 2020 07 02.78 11.9 25.0 L 74 2.2 2/ WYA
V 29P 2020 07 02.77 [14.0 25.0 L 125 WYA
C C/2020 F3 2020 07 02.12 1.5 30.0 q a 4 1 8 PAP04
V C/2020 F3 2020 07 02.12 1.0 5.0 B 12 1 7 PAP04
V C/2019 U6 2020 07 01.92 7.0 7.0 B 15 6 6 SOU01
V C/2019 U6 2020 07 01.91 7.1 10.0 B 25 5 6 DES01
V C/2019 U6 2020 07 01.90 6.9 5.0 B 10 8 4 AMO01
V 2P 2020 07 01.89 7.5: 9.0 R 36 1 7 AMO01

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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/2020 F3 (NEOWISE) 1.0 steady 90N to 59S Poor elongation Poor elongation
A/2019 U6 3.5 fade 90N to 90S Early evening Evening
2P/Encke 5.5 fade 90N to 75S Early evening Early evening
C/2019 U6 6.5 fade 90N to 90S Early evening Evening
C/2020 F8 (SWAN) 9.5 fade 90N to 60S Poor elongation Poor elongation
C/2017 T2 (PANSTARRS) 9.5 fade 90N to 51S Best morning Evening
C/2019 Y4 (ATLAS) 10.0 fade 90N to 87S Early evening Early evening
88P/Howell 11.0 bright 84N to 90S Evening Best evening
58P/Jackson-Neujmin 11.0 fade 90N to 77S Early evening Early evening
C/2019 Y4-A (ATLAS) 12.5 fade 90N to 87S Early evening Early evening
C/2008 Y12 (SOHO) 12.5 bright 56N to 90S Best morning Best morning
11P/Tempel-Swift-LINEAR 13.0 bright 90N to 74S Best morning Best morning
29P/Schwassmann-Wachmann 13.5 steady 90N to 66S Early evening Early evening
C/2019 Y1 (ATLAS) 13.5 fade 90N to 69S Best evening Evening
C/2019 Y4-B (ATLAS) 13.5 fade 90N to 87S Early evening Early evening
C/2019 Y4-C (ATLAS) 13.5 fade 90N to 87S Early evening Early evening
C/2019 Y4-D (ATLAS) 13.5 fade 90N to 87S Early evening Early evening
C/2019 N1 (ATLAS) 14.0 bright 90N to 35S All night Never up
249P/LINEAR 14.0 fade 90N to 61S Early evening Early 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.

Top news

Jun. 08, 2020

ZWO ASI Camera type keys

In order to unify the camera type abbreviation keys of all ZWO ASI camera models, we had to change some of the currently used camera type keys.

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Latest news

Jun. 19, 2020

4,000th comet discovered by ESA and NASA Solar Observatory

On June 15, 2020, a citizen scientist spotted a never-before-seen comet in data from the Solar and Heliospheric Observatory, or SOHO -- the 4,000th comet discovery in the spacecraft's 25-year history.

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Jun. 04, 2020

New Comet C/2020 K7 (PANSTARRS)

CBET 4790 & MPEC 2020-L09, issued on 2020, June 02, announce the discovery of a comet (magnitude ~20) in four 45-s w-band CCD images obtained with the Pan-STARRS1 1.8-m Ritchey-Chretien reflector at Haleakala. The new comet has been designated C/2020 K7 (PANSTARRS).

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May. 31, 2020

Solar Orbiter to pass through the tails of Comet ATLAS

ESA's Solar Orbiter will cross through the tails of Comet ATLAS during the next few days. Although the recently launched spacecraft was not due to be taking science data at this time, mission experts have worked to ensure that the four most relevant instruments will be switched on during the unique encounter.

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May. 26, 2020

New Comet C/2020 K3 (Leonard)

CBET 4782 & MPEC 2020-K159, issued on 2020, May 25, announce the discovery of a comet (magnitude ~18) by G. J. Leonard on images taken on May 22 UT with the Catalina Sky Survey's 0.68-m Schmidt reflector. The new comet has been designated C/2020 K3 (Leonard).

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May. 17, 2020

New Comet P/2019 LM4 (Palomar)

CBET 4775 & MPEC 2020-J68, issued on 2020, May 14, announce that an apparently asteroidal object discovered on images taken at Palomar on 2019 June 4 and 7 with the 1.2-m f/2.4 Schmidt telescope (and given the minor-planet designation 2019 LM_4 when published on MPS 1001527, along with observations made elsewhere on June 8) has been re-discovered showing cometary appearance at two other observatories. The new comet has been designated P/2019 LM4 (Palomar).

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