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 250000 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 F8 (SWAN) (May 28, 2020).

Type Comet name Obs date Mag App T Pow Dia DC Tail PA Obs
V C/2017 T2 2020 05 27.95 8.6 25.4 T 96 4 5 COLac
V C/2019 U6 2020 05 27.43 7.3 10.0 L 20 4.5 5 PEA
C C/2020 K3 2020 05 27.20 15.8 50.0 L a150 0.3 HILaa
C C/2019 L3 2020 05 27.19 16.3 50.0 L a150 0.4 HILaa
C C/2019 K7 2020 05 27.10 15.8 50.0 L a150 0.4 HILaa
C 257P 2020 05 27.06 17.3 50.0 L a150 0.3 HILaa
V C/2017 T2 2020 05 26.98 9.1 25.4 T 96 3.6 5 COLac
V C/2020 F8 2020 05 26.97 8.4 30.0 L 86 6.5 1 HAR11
V C/2017 T2 2020 05 26.97 8.9 30.0 L 69 4.5 4 13.0m 275 HAR11
V C/2019 Y1 2020 05 26.95 12.0 30.0 L 86 2.5 1 HAR11
C C/2017 T2 2020 05 26.94 9.4 12.0 R A800 SMIab
V C/2020 F3 2020 05 26.91 8.3 10.0 B 25 3 3 DES01
V C/2019 U6 2020 05 26.90 6.8 5.0 B 10 6 5/ AMO01
V C/2019 U6 2020 05 26.90 6.9 10.0 B 25 8 5 DES01
V C/2019 U6 2020 05 26.90 7.0 8.0 B 11 DES01
V C/2020 F3 2020 05 26.89 8.2 9.0 R 36 3 4 AMO01
V C/2017 T2 2020 05 26.88 9.3 60.0 L 81 4 6 10.0m 315 SZA
V C/2017 T2 2020 05 26.88 9.0 8.0 B 20 & 5 4 DIAab
V C/2019 Y1 2020 05 26.86 10.8 60.0 L 81 4.5 3 SZA
V C/2020 F8 2020 05 26.84 7.8 60.0 L 187 2 3 SZA

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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/2019 Y4-B (ATLAS) 3.5 steady 90N to 63S Poor elongation Poor elongation
C/2019 Y4-A (ATLAS) 3.5 steady 90N to 63S Poor elongation Poor elongation
C/2019 Y4-C (ATLAS) 4.0 steady 90N to 63S Poor elongation Poor elongation
C/2020 F8 (SWAN) 4.5 fade 90N to 43S All night Never up
A/2019 U6 5.0 bright 70N to 90S Early evening Evening
C/2019 Y4-D (ATLAS) 5.5 bright 90N to 63S Poor elongation Poor elongation
C/2019 U6 7.0 bright 70N to 90S Early evening Evening
C/2020 F3 (NEOWISE) 8.0 bright 85N to 90S Early evening Evening
C/2019 Y4 (ATLAS) 8.5 steady 90N to 63S Poor elongation Poor elongation
C/2017 T2 (PANSTARRS) 9.0 fade 90N to 23S All night Never up
58P/Jackson-Neujmin 10.5 steady 90N to 82S Early evening Early evening
C/2019 Y1 (ATLAS) 11.0 fade 90N to 38S All night Never up
2P/Encke 11.0 bright 90N to 64S Poor elongation Poor elongation
C/2008 Y12 (SOHO) 12.5 bright 56N to 90S Best morning Best morning
88P/Howell 13.0 bright 88N to 90S Best evening Best evening
210P/Christensen 13.5 fade 90N to 62S Best evening Evening
C/2018 N2 (ASASSN) 14.0 fade 90N to 20S All night Never up
29P/Schwassmann-Wachmann 14.0 steady 90N to 68S Early evening Early evening
11P/Tempel-Swift-LINEAR 14.0 bright 90N to 84S Best morning 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.

Latest news

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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May. 14, 2020

New comet discovered by solar observatory

In late May and early June, Earthlings may be able to glimpse Comet SWAN. The comet is currently faintly visible to the unaided eye in the Southern Hemisphere just before sunrise. The new comet was first spotted in April 2020, by an amateur astronomer named Michael Mattiazzo using data from the SOHO satellite.

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May. 08, 2020

New Comet C/2020 J1 (SONEAR)

CBET 4769 & MPEC 2020-J37, issued on 2020, May 04, announce the discovery of a comet (magnitude ~17) on images taken with a 0.28-m f/2.2 astrograph of the "Southern Observatory for Near Earth Research" (SONEAR) at Oliveira, Brazil, on May 1 . The new comet has been designated C/2020 J1 (SONEAR).

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May. 08, 2020

New Comet C/2020 H6 (ATLAS)

CBET 4768 & MPEC 2020-J23, issued on 2020, May 03, announce the discovery of a comet (magnitude ~18.5) on individual images from taken on Apr. 22 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 C/2020 H6 (ATLAS).

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