Comet C/2014 Q2 (Lovejoy)
Color image obtained on 2015 Jun. 12 (21h45-21h51UT) with 60-cm, f/3.3 telescope and LBVR filters. Exposure time was 60s in each filter. Copyright © 2015 by H. Mikuz, Crni Vrh Observatory.

Welcome to COBS!

Comet Observation database (COBS) was developed in 2010 and is maintained by Crni Vrh Observatory. It is a unique service offering comet observers to submit, display and analyse comet data in a single location and is opened to comet observers worldwide. Registered observers may submit the observations using a simple web-based form which will store their observations into an SQL database and display them in ICQ format.

Data stored in COBS database is freely available to everyone with respect to our data usage policy, and can be analysed with COBS online tools or exported and further used in other analysis software and publications.

Database currently contains more than 100000 comet observations of more than 820 different comets and represents the largest available database of comet observations.

Amateur comet observers can make a useful contribution to science by observing comets and submitting their observations to the COBS, as the professional astronomers do not have the time nor the telescopes needed to gather such data. We encourage comet observers worldwide to submit their observations and contribute to the COBS database.

Light-curve of Comet C/2013 US10 (Catalina) (Aug 27, 2015).

Recent observations

Type  Comet name  Obs date       Mag     Dia   DC  Tail     Observer
  V      2013US10 2015 08 30.94   6.6    10    3            SOU01
  V      2013US10 2015 08 30.93   6.6    10    3            SOU01
  V      2013US10 2015 08 30.93   6.4    15    3/           GOI  
  V      2013US10 2015 08 30.92   6.5    10    4            SOU01
  V      2013US10 2015 08 29.92   6.5     8    3            SOU01
  V      2014Q2   2015 08 29.83  10.2     8.35              HAE  
  V      2013US10 2015 08 28.94   6.4    15    3            GOI  
  V      2013US10 2015 08 28.93   6.5    10    4            GOI  
  V      2013US10 2015 08 28.92   6.5     8    3            SOU01
  V      2013US10 2015 08 26.94   6.6    10    3            SOU01
  C   141         2015 08 26.47  12.2     4.5               LEHaa
  C    88         2015 08 26.44  10.8    15        0.31 253 LEHaa
  C      2015F4   2015 08 25.83  11.3     5        0.11 156 LEHaa
  V    67         2015 08 25.05  12.4     0.8  4            GUZ  
  V   141         2015 08 25.04  12.0     2    2            GUZ  

                            

Comet Observing Planner

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Current comet magnitudes (August 18)

Comet                     Magnitude   Trend    Observable     When visible
Catalina (2013 US10)           6.5    bright   10 N to 85 S   all night
PanSTARRS (2014 Q1)            9      fade      0 N to 85 S   evening
Lovejoy (2014 Q2)             10      fade     60 N to 20 S   all night
SWAN (2015 P3)                10.5    fade     30 N to 70 S   evening
Jacques (2015 F4)             11      fade     60 N to 30 S   all night
19P/Borelly                   11.5 ?  fade     Poor elongation
88P/Howell                    11.5    fade     60 N to 55 S   morning
MASTER (2015 G2)              12      fade     Poor elongation
22P/Kopff                     12      bright   30 N to 70 S   evening
67P/Churyumov-Gerasimenko     12.5    bright   45 N to 15 S   early morning
Spacewatch (2011 KP36)        12.5 ?  steady   55 N to 60 S   best evening
29P/Schwassmann-Wachmann      13 ?    varies   30 N to 85 S   best evening
PanSTARRS (2012 F3)           13.5 ?  fade     45 N to 70 S   best evening
PanSTARRS (2012 K1)           13.5 ?  fade     35 N to 85 S   best morning
10P/Tempel                    14 ?    bright   45 N to 75 S   evening

List of comets maintained by Jonathan Shanklin at http://www.ast.cam.ac.uk/~jds.


Latest news

Aug. 17, 2015

Rosetta’s big day in the Sun

ESA’s Rosetta today witnessed Comet 67P/Churyumov–Gerasimenko making its closest approach to the Sun. The exact moment of perihelion occurred at 02:03 GMT this morning when the comet came within 186 million km of the Sun.

more...

Aug. 17, 2015

Comet’s firework display ahead of perihelion

In the approach to perihelion over the past few weeks, Rosetta has been witnessing growing activity from Comet 67P/Churyumov–Gerasimenko, with one dramatic outburst event proving so powerful that it even pushed away the incoming solar wind.

more...

Aug. 15, 2015

CometWatch 6 August

Today's CometWatch entry is an image of Comet 67P/Churyumov-Gerasimenko taken on 6 August 2015, exactly a year to the day of Rosetta's historic rendezvous. The image was taken 261 km from the comet centre.

more...

Aug. 05, 2015

Organic molecules on comets: Philae's first results from Churi prove surprising

Organic molecules never previously observed in comets, a relatively varied structure on the surface but a fairly homogeneous interior, organic compounds forming agglomerates rather than being dispersed in the ice: these are just some of first results provided by Philae on the surface of comet Churi. These in situ findings, which contain a wealth of completely new information, reveal several differences in comparison with previous observations of comets and current models.

more...

Aug. 05, 2015

Comets: Soft shell, hard core?

Comet Churyumov-Gerasimenko poses new riddles: Surface material measurements performed by the Philae landing module indicate that the near surface material might have changed since its formation. Up to now, many researchers had assumed that it has remained in virtually the same state since its formation about 4.5 billion years ago.

more...