Comet C/2014 E2 (Jacques) on 2014 Aug. 09
False color unfiltered image of comet C/2014 E2 (Jacques), obtained on 2014 Aug. 9 (2h37-2h40UT) with 60-cm, f/3.3 Deltagraph telescope. Exposure time was 6x30 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/2014 E2 (Jacques) (Sep 16, 2014).

Recent observations

Type  Comet name  Obs date       Mag     Dia   DC  Tail     Observer
  V      2014E2   2014 09 17.80   8.3     7    3            MEY  
  V      2012X1   2014 09 17.44  11.8     2    3            CAM03
  V      2014E2   2014 09 17.43   8.1     6    3            CAM03
  V      2013A1   2014 09 17.41   9.5     2    5            CAM03
  C      2013V5   2014 09 17.39   7.2     3                 CER01
  C      2013V5   2014 09 17.37   7.5     2.7               CER01
  V      2013V5   2014 09 17.35   6.6     5    4/           GOI  
  V      2012K1   2014 09 17.33   7.1     5    5            GOI  
  V      2014E2   2014 09 16.81   8.3     6.5  3/           MEY  
  V      2012K1   2014 09 16.77   8.0     4    4            CAM03
  C      2013V5   2014 09 16.38   7.4     3.66              CER01
  C      2013V5   2014 09 16.38   6.8     2.48              CER01
  V      2014E2   2014 09 15.80   8.5     5.5  3/           MEY  
  V      2014E2   2014 09 15.80   8.8     5    3            PAPab
  C      2014Q2   2014 09 15.73  13.8     0.3               HILaa


Comet Observing Planner

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Current comet magnitudes (September 16)

Comet                     Magnitude   Trend    Observable     When visible
Oukaimeden (2013 V5)           6.5    steady   15 S to 75 S   early morning
PanSTARRS (2012 K1)            7      steady   50 N to 60 S   early morning
Jacques (2014 E2)              9      fade     70 N to 50 S   best evening
Siding Spring (2013 A1)        9.5    fade     15 N to 75 S   best evening
LINEAR (2012 X1)              11.5    fade     15 N to 75 S   all night
29P/Schwassmann-Wachmann      13 ?    varies   15 N to 75 S   evening
PanSTARRS (2012 F3)           13.5    steady   10 N to 30 S   early evening
4P/Faye                       13.5 ?  fade     45 N to 15 S   early morning
LINEAR (2011 J2)              13.5 ?  fade     70 N to 10 S   all night
Lovejoy (2014 Q2)             14 ?    bright    5 N to 75 S   morning
Catalina (2013 US10)          14 ?    bright   35 N to 75 S   all night
117P/Helin-Roman-Alu          14      fade     30 N to 75 S   best evening
LINEAR (2010 S1)              14      fade     50 N to 65 S   early evening

List of comets maintained by Jonathan Shanklin at

Latest news

Sep. 16, 2014

'J' Marks the Spot for Rosetta's Lander

The European Space Agency's Rosetta's lander, Philae, will target Site J, an intriguing region on comet 67P/Churyumov-Gerasimenko that offers unique scientific potential, with hints of activity nearby, and minimum risk to the lander compared to the other candidate sites. The 220-pound (100-kilogram) lander is scheduled to reach the surface on November 11, where it will perform in-depth measurements to characterize the nucleus. Rosetta is an international mission spearheaded by the European Space Agency with support and instruments provided by NASA.

Sep. 14, 2014

First Map of Rosetta's Comet

Scientists have found that the surface of comet 67P/Churyumov-Gerasimenko -- the target of study for the European Space Agency's Rosetta mission -- can be divided into several regions, each characterized by different classes of features. High-resolution images of the comet reveal a unique, multifaceted world.

Sep. 10, 2014

Down, down we go to 29 km – or lower?

The Rosetta mission control team are transitioning Europe’s intrepid craft onto the next stage of cometary operations: the Global Mapping Phase (GMP). The update below is based on inputs provided by Flight Director Andrea Accomazzo at ESOC and Project Scientist Matt Taylor at ESTEC.

Sep. 06, 2014

Rosetta Comet is Darker than Charcoal

A NASA instrument aboard the European Space Agency’s (ESA's) Rosetta orbiter has successfully made its first delivery of science data from comet 67P/Churyumov-Gerasimenko.

Sep. 05, 2014

Rosetta - Alice spectrograph obtains first far ultraviolet spectra of a cometary surface

NASA's Alice ultraviolet (UV) spectrograph aboard the European Space Agency's Rosetta comet orbiter has delivered its first scientific discoveries. Rosetta, in orbit around comet 67P/Churyumov-Gerasimenko, is the first spacecraft to study a comet up close.