Periodic Comet 252P/LINEAR
Image of periodic comet 252P/LINEAR, obtained on 2016 May 7 (0h46-0h53UT) with 60-cm, f/3.3 Deltagraph. Exposure time 90s in LBVR filters. Copyright © 2016 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 224000 comet observations of more than 1100 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 X1 (PANSTARRS) (Jul 22, 2016).

Recent observations

Type  Comet name  Obs date       Mag     Dia   DC  Tail     Observer
  V    53         2016 07 25.41  13.6     1    2/           WYA  
  V      2013X1   2016 07 25.40   9.9     5.1  4/  50.0m107 WYA  
  V     9         2016 07 25.38  12.2     2.6  2/           WYA  
  V   237         2016 07 25.38  13.7     0.9  6    1.5m 78 WYA  
  V      2014W2   2016 07 25.37  13.6:    0.6  3            WYA  
  V      2014S2   2016 07 25.36  13.9     0.7  2            WYA  
  V    81         2016 07 25.35  10.9     2.5  3            WYA  
  C      2015V2   2016 07 23.80  14.2     0.43 7    0.5m278 NOV01
  C      2015V2   2016 07 23.80  14.3     0.43 7    0.5m278 NOV01
  V      2014W2   2016 07 23.38  13.6     0.8  2            WYA  
  V      2014S2   2016 07 23.37  12.9     1.8  2/           WYA  
  V    81         2016 07 23.35  11.3     2.7  3            WYA  
  C      2015V2   2016 07 21.80  14.2     0.44 7    0.5m274 NOV01
  C      2015V2   2016 07 21.80  14.3     0.44 7    0.5m274 NOV01
  C   188         2016 07 16.21  17.7     0.2               HILaa

                            

Comet Observing Planner

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Current comet magnitudes and observable region (July 4)

Comet                     Magnitude   Trend    Observable     When visible
PanSTARRS (2013 X1)            7      fade     35 N to 90 S   all night
81P/Wild                      10      steady   30 N to 35 S   early evening
PanSTARRS (2014 S2)           11.5    fade     50 N to 40 S   early evening
226P/Pigott-LINEAR-Kowalski   12 ?    bright   15 N to 75 S   morning
9P/Tempel                     12      steady   45 N to 65 S   evening
Spacewatch (2011 KP36)        12.5    steady   45 N to 60 S   morning
PanSTARRS (2014 W2)           12.5    fade     50 N to  5 N   all night
53P/Van Biesbroeck            13      steady   45 N to 70 S   best morning
237P/LINEAR                   13      steady   35 N to 70 S   evening
29P/Schwassmann-Wachmann      13 ?    varies   40 N to 90 S   best morning
Catalina (2013 US10)          13      fade     Poor elongation
Lovejoy (2014 Q2)             13 ?    fade     50 N to 35 S   best morning
116P/Wild                     14      fade     30 N to 75 S   best evening
PanSTARRS (2015 WZ)           14      fade     50 N to  5 S   all night

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


Latest news

Jul. 05, 2016

CometWatch 25 June

This week's CometWatch image was taken with Rosetta's NAVCAM on 25 June 2016, when the spacecraft was 16.7 km from the nucleus of Comet 67P/Churyumov-Gerasimenko.

more...

Jul. 01, 2016

Chaotic orbit of Comet Halley explained

A team of Dutch and Scottish researchers led by Simon Portegies Zwart (Leiden University) has found an explanation for the chaotic behavior of the orbit of Halley's Comet. The findings are accepted for publication in the Monthly Notices of the Royal Astronomical Society.

more...

Jun. 27, 2016

CometWatch 17 June

This week’s CometWatch entry soaks up the sights of a number of regions on both the small (right) and large (left) lobes of Comet 67P/Churyumov-Gerasimenko. The image was taken by Rosetta’s NAVCAM on 17 June from a distance of 30.8 km, and the image measures about 2.7 km across.

more...

Jun. 18, 2016

New Comet: C/2016 K1 (LINEAR)

CBET nr. 4282, issued on 2016, June 05, announces the discovery of an apparently asteroidal object (magnitude ~18.5) found on CCD images taken on May 31 with the 3.5-m f/1 Space Surveillance Telescope on Atom Peak in the White Sands Missile Range, NM, USA, in the course of the LINEAR survey.

more...

Jun. 18, 2016

CometWatch 13 June

This image of Comet 67P/Churyumov-Gerasimenko was taken by Rosetta’s NAVCAM on 13 June 2016 from a distance of 28.5 km to the centre of the comet.

more...