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) (Jun 17, 2016).

Recent observations

Type  Comet name  Obs date       Mag     Dia   DC  Tail     Observer
  V      2013X1   2016 06 18.85   6.9     8    5            PEA  
  V      2013X1   2016 06 15.80   6.2    15    5            CAM03
  V      2013X1   2016 06 15.14   6.5    15    4            SOU01
  V   226         2016 06 14.92 [13.5                       PEA  
  V    53         2016 06 14.91  14.3:    0.4  2/           PEA  
  V      2013X1   2016 06 14.80   6.2    15    5            CAM03
  V      2013X1   2016 06 14.67   6.8     9    4            PEA  
  V      2013X1   2016 06 14.17   6.5    15    3            SOU01
  V      2013X1   2016 06 14.15   6.4    15    4            GOI  
  C    29         2016 06 14.14  12.6     0.8               HILaa
  V   226         2016 06 13.92 [13.0                       PEA  
  V      2013X1   2016 06 13.82   6.8    11    4            PEA  
  V    53         2016 06 13.82  14.3:    0.4  2            PEA  
  V      2013X1   2016 06 13.82   6.3    15    4            CAM03
  V    29         2016 06 13.81  14.2:    0.4  2            PEA  

                            

Comet Observing Planner

Start session:
Session length:
Limiting mag:
Min altitude:

Current comet magnitudes and observable region (June 6)

Comet                     Magnitude   Trend    Observable     When visible
PanSTARRS (2013 X1)            6.5    steady   45 N to 90 S   best morning
81P/Wild                      11      steady   40 N to 40 S   early evening
PanSTARRS (2014 S2)           11      fade     50 N to 35 S   best evening
PanSTARRS (2015 WZ)           12      steady   50 N to 15 S   all night
252P/LINEAR                   12      fade     50 N to 55 S   all night
PanSTARRS (2014 W2)           12.5    steady   50 N to  5 N   all night
226P/Pigott-LINEAR-Kowalski   12.5 ?  bright   10 S to 80 S   morning
9P/Tempel                     13      steady   50 N to 45 S   early evening
Spacewatch (2011 KP36)        13      steady   30 N to 60 S   morning
53P/Van Biesbroeck            13 ?    steady   35 N to 65 S   best evening
29P/Schwassmann-Wachmann      13 ?    varies   40 N to 90 S   best morning
116P/Wild                     13      fade     35 N to 80 S   best evening
Catalina (2013 US10)          13      fade     Poor elongation
Lovejoy (2014 Q2)             13 ?    fade     50 N to 35 S   best morning
77P/Longmore                  14      fade     30 N to 65 S   evening

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


Latest news

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...

Jun. 16, 2016

CometWatch 2 June

This week's CometWatch entry is an image of Comet 67P/Churyumov-Gerasimenko taken with Rosetta's NAVCAM on 2 June 2016, when the spacecraft was 23.6 km from the comet centre.

more...

May. 30, 2016

CometWatch 19 May

This week's CometWatch entry is an image of Comet 67P/Churyumov-Gerasimenko taken with Rosetta's NAVCAM on 19 May 2016, when the spacecraft was 7.6 km from the centre of the comet nucleus and about 5.6 km from the surface.

more...

May. 23, 2016

CometWatch 15 May

This week’s CometWatch entry from Rosetta’s NAVCAM was taken on 15 May 2016 when the spacecraft was 9.88 km from Comet 67P/Churyumov-Gerasimenko.

more...