Comet C/2014 E2 (Jacques) on 2014 Aug. 29
True color image of comet C/2014 E2 (Jacques), obtained on 2014 Aug. 29 (20h35-21h09UT) with 60-cm, f/3.3 Deltagraph telescope. Exposure time was 12x15 seconds. Copyright © 2014 H. Mikuz, OCV.

Welcome to COBS!

Between 1989-1997 an intensive comet photometry program at Crni Vrh Observatory resulted in contribution of hundreds of CCD observations to the ICQ database and IAU Circulars. This also created a need for an online observational database. The first version was created in 2002 and was used by Slovenian comet observers. The database contained 35 visually observed comets during the period 2002-2008. The best observed comets, with complete light-curves collected have been C/2002 C1 (Ikeya-Zhang), C/2002 V1 (NEAT), C/2001 Q4 (NEAT) and C/2004 Q2 (Machholz) as well as outburst of comet 17P/Holmes in late 2007.

The Comet Observation Database (COBS) is unique service, offering comet observers to submit, display and analyse comet data in a single location. It is maintained by the Crni Vrh Observatory and is opened to comet observers worldwide. Registered observers may now submit the observations using a simple web-based form which will store their observations into an SQL database and display them in ICQ format. Furthermore the users will be able to create light-curve graphs of selected comets and see all the observations. We encourage comet observers worldwide to submit their observations and contribute to the COBS database.

Observers are reminded that the ultimate address which is collecting and storing comet data is International Comet Quarterly.

Light-curve of Comet C/2012 K1 (PANSTARRS) (Oct 24, 2014).

Recent observations

Type  Comet name  Obs date       Mag     Dia   DC  Tail     Observer
  V      2014Q2   2014 10 30.67  10.2     2.6  4/           WYAab
  V      2012K1   2014 10 30.65   7.6     8    6            WYAab
  V      2012K1   2014 10 30.64   8.2:    5.8  5/           WYAab
  C      2013V4   2014 10 30.59  15.6     0.2               HILaa
  V      2014R1   2014 10 30.49 [11.4                       AGUag
  V      2014Q3   2014 10 30.48  11.0:    4    1/           AGUag
  V      2014Q2   2014 10 30.47  11.0:    3    0/           AGUag
  V      2012K1   2014 10 30.46   8.0     7    3/           AGUag
  C    17         2014 10 30.45  14.3     0.4               DYMaa
  C      2013A1   2014 10 30.41  11.5     0.18 6            PAUaa
  V      2012X1   2014 10 30.08 [10.8                       AGUag
  V      2013A1   2014 10 30.07 [11.3                       AGUag
  V      2014Q3   2014 10 28.90  11.1:  & 2.5  2/           BIEaa
  V      2014Q3   2014 10 28.89  11.3     1.5  2            HAR11
  V   108         2014 10 28.89  13.8     0.8  4/           CER01


Comet Observing Planner

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Current comet magnitudes (October 27)

Comet                     Magnitude   Trend    Observable     When visible
PanSTARRS (2012 K1)            7      steady   50 N to 65 S   early morning
Oukaimeden (2013 V5)           9      fade     15 N to 50 S   early evening
Siding Spring (2013 A1)       10.5    fade     35 N to 65 S   evening
Jacques (2014 E2)             11.5    fade     70 N to 50 S   evening
Lovejoy (2014 Q2)             12      bright   25 N to 65 S   best morning
Borisov (2014 R1)             12      bright   60 N to  5 S   early morning
Borisov (2014 Q3)             12      bright   85 N to  0 N   best morning
LINEAR (2012 X1)              12.5    fade     10 N to 65 S   best evening
29P/Schwassmann-Wachmann      13 ?    varies   25 S to 35 S   early evening
PanSTARRS (2012 F3)           13.5 ?  steady   Poor elongation
Catalina (2013 US10)          14      bright   35 N to 65 S   best evening
117P/Helin-Roman-Alu          14      fade     20 N to 65 S   evening

List of comets maintained by Jonathan Shanklin at

Latest news

Oct. 27, 2014

Rosetta's Comet Scrambling Its Jets

This image of comet 67P/Churyumov-Gerasimenko, taken by Rosetta's Optical, Spectroscopic, and Infrared Remote Imaging System (OSIRIS) on Sept. 20, from a distance of 4.5 miles (7.2 kilometers), shows jets of dust and gas streaming into space from the neck of the comet's nucleus.

Oct. 27, 2014

Mars Orbiter's Spectrometer Shows Oort Comet's Coma

The Compact Imaging Spectrometer for Mars (CRISM) observed comet C/2013 A1 Siding Spring as the comet sped close to Mars on Oct. 19. CRISM recorded imaging data in 107 different wavelengths, showing the inner part of the cloud of dust, called the coma, surrounding the comet's nucleus.

Oct. 27, 2014

MAVEN Ultraviolet Image of Comet Siding Spring's Hydrogen Coma

NASA's Mars Atmosphere and Volatile Evolution (MAVEN) spacecraft obtained this ultraviolet image of hydrogen surrounding comet C/2013 A1 Siding Spring on Oct. 17, 2014, two days before the comet's closest approach to Mars. The Imaging Ultraviolet Spectrograph (IUVS) instrument imaged the comet at a distance of 5.3 million miles (8.5 million kilometers).

Oct. 24, 2014

Two families of comets found around nearby star: Biggest census ever of exocomets around Beta Pictoris

The HARPS instrument at ESO's La Silla Observatory in Chile has been used to make the most complete census of comets around another star ever created. A French team of astronomers has studied nearly 500 individual comets orbiting the star Beta Pictoris and has discovered that they belong to two distinct families of exocomets: old exocomets that have made multiple passages near the star, and younger exocomets that probably came from the recent breakup of one or more larger objects. The new results will appear in the journal Nature on 23 October 2014.

Oct. 24, 2014

The perfume of the comet

How does a comet smell? Since early August the Rosetta Orbiter Sensor for Ion and Neutral Analysis (ROSINA) is sniffing the fumes of the comet Churyumov-Gerasimenko with its two mass spectrometers. The detected chemistry in the coma of the comet is surprisingly rich already at more than 400 million kilometres from the Sun.