Latest image
Comet C/2015 O1 (PANSTARRS)
False color unfiltered image of comet C/2015 O1 (PANSTARRS), obtained on 2018 Apr. 8 (1h13-1h23UT) with 60-cm, f/3.3 Deltagraph. Exposure time was 8x60s.
Copyright © 2018 by H. Mikuz, Črni Vrh Observatory.
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 233000 comet observations of more than 1200 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/2016 M1 (PANSTARRS) (Jun 18, 2018).
Type Comet name Obs date Mag Dia DC Tail Observer V 2016M1 2018 06 18.05 8.7 5 4/ GOI V 37 2018 06 17.33 12.7: 1 4 GOI V 66 2018 06 16.33 11.2 2 2/ GOI V 2016M1 2018 06 16.03 8.8 4.5 4/ GOI V 2016M1 2018 06 15.95 8.5 5 6 NAV02 C 2015O1 2018 06 15.95 13.9 2.9 FRIaa V 2018EF9 2018 06 15.94 [14.3 ! 2.1 CER01 V 2015O1 2018 06 15.93 13.9 1.3 3/ CER01 V 21 2018 06 15.93 12.7 1.7 4/ CER01 C 2015O1 2018 06 15.91 14.2 2.9 FRIaa V 37 2018 06 15.76 13.2 2 6 WYA V 29 2018 06 15.76 [14.9 WYA V 66 2018 06 15.75 11.1 5.5 3 WYA V 48 2018 06 15.74 14.2 1.3 4 WYA V 21 2018 06 15.73 12.5 1.4 3/ WYA
Comet Observing Planner
Current comet magnitudes and observable region
Comet Mag Trend Observable When visible
45N 45S
C/2016 M1 (PANSTARRS) 8.5 bright 53N to 90S Best morning Best morning
66P/du Toit 11.0 fade 64N to 90S Early evening Best morning
C/2017 T3 (ATLAS) 11.5 bright 90N to 77S Poor elongation Poor elongation
C/2016 R2 (PANSTARRS) 11.5 steady 90N to 39S All night Never up
21P/Giacobini-Zinner 12.5 bright 90N to 47S Best morning Early evening
C/2016 N6 (PANSTARRS) 12.5 steady 90N to 50S Best evening Early evening
37P/Forbes 12.5 fade 85N to 90S Best morning Best morning
P/2010 H2 (Vales) 13.0 fade 70N to 90S Best evening Best evening
29P/Schwassmann-Wachmann 13.0 steady 90N to 89S Best morning Best morning
C/2015 O1 (PANSTARRS) 13.5 fade 90N to 39S All night Never up
P/2013 R3-B (Catalina-PANSTARRS) 14.0 bright 74N to 90S Best morning Best morning
240P/NEAT 14.0 steady 90N to 66S Poor elongation Poor elongation
P/2013 R3-A (Catalina-PANSTARRS) 14.0 bright 74N to 90S Best morning Best morning
C/2017 M4 (ATLAS) 14.0 bright 90N to 44S All night Never up
C/2017 S3 (PANSTARRS) 14.0 bright 90N to 31S All night 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.
Latest news
What interstellar visitor 'Oumuamua can teach us
The first interstellar object ever seen in our solar system, named 'Oumuamua, is giving scientists a fresh perspective on the development of planetary systems. A new study by a team including astrophysicists at NASA's Goddard Space Flight Center in Greenbelt, Maryland, calculated how this visitor from outside our solar system fits into what we know about how planets, asteroids and comets form.
A star disturbed the comets of the solar system 70,000 years ago
About 70,000 years ago, a small reddish star approached our solar system and gravitationally disturbed comets and asteroids. Astronomers from the Complutense University of Madrid and the University of Cambridge have verified that the movement of some of these objects is still marked by that stellar encounter.
New Comet: C/2018 E1 (ATLAS)
CBET nr. 4494, issued on 2018, March 16, announces the discovery of an apparently asteroidal object (magnitude ~17) in the course of the "Asteroid Terrestrial-impact Last Alert System" (ATLAS) search program on CCD images obtained with a 0.5-m f/2 Schmidt reflector at Haleakala, Hawaii. Posted on the Minor Planet Center's PCCP webpage, it has been reported as showing cometary activity by CCD astrometrists elsewhere. The new comet has been designated C/2018 E1 (ATLAS).
Interstellar asteroid, 'Oumuamua, likely came from a binary star system
New research finds that 'Oumuamua, the rocky object identified as the first confirmed interstellar asteroid, very likely came from a binary star system.
Comet 'Chury's' late birth
Comets which consist of two parts, like Chury, can form after a catastrophic collision of larger bodies. Such collisions may have taken place in a later phase of our solar system, which suggests that Chury can be much younger than previously assumed. This is shown through computer simulations by an international research group with the participation of the University of Bern.