Comet C/2014 Q2 (Lovejoy)
True color image obtained on 2015 Mar. 10 (18h49-18h57UT) 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!

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 are 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.

Light-curve of Comet C/2014 Q2 (Lovejoy) (Apr 24, 2015).

Recent observations

Type  Comet name  Obs date       Mag     Dia   DC  Tail     Observer
  V      2013US10 2015 04 25.78  12.8     1.2  4            CAM03
  V      2015G2   2015 04 25.77   8.0     4.8  6            CAM03
  V    88         2015 04 25.76   9.3     3.5  3            CAM03
  V      2015G2   2015 04 25.72   7.9     4.6  5/           WYAab
  V      2015C2   2015 04 25.08 [11.4   ! 1.8               BIEaa
  V      2015F3   2015 04 25.07  11.2:  & 2    0            BIEaa
  V      2014Q2   2015 04 25.05   7.3     6    3/  0.1  350 BIEaa
  V      2014Q2   2015 04 25.04   7.1     7.5  5            BIEaa
  V      2015F5   2015 04 24.84  10.4     2.3  2/           BIEaa
  V      2015G2   2015 04 24.79   7.9     7    6            WYAab
  V      2013US10 2015 04 24.76  12.9     1.1  4/           WYAab
  V    88         2015 04 24.75  10.0     3.2  4            WYAab
  V      2015G2   2015 04 24.74   7.9     5.3  5            WYAab
  V      2014Q2   2015 04 23.84   7.3     8    3            BAR06
  V      2015F5   2015 04 23.13 [11.3                       AGUag

                            

Comet Observing Planner

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Current comet magnitudes (April 16)

Comet                     Magnitude   Trend    Observable     When visible
Lovejoy (2014 Q2)              7      fade     65 N to 15 N   all night
MASTER (2015 G2)               8.5    bright   30 N to 85 S   morning
SWAN-Xingming (2015 F5)        8.5    fade     65 N to 35 N   evening + daw
88P/Howell                     9      fade     30 N to 85 S   morning
SWAN (2015 C2)                 9.5    steady   Poor elongation
SWAN (2015 F3)                10      fade     65 N to 20 N   all night
19P/Borelly                   10.5 ?  bright   Conjunction
SOHO (2015 D1)                11      fade     65 N to 15 N   evening
Catalina (2013 US10)          12 ?    bright    0 S to 85 S   morning
PanSTARRS (2014 Q1)           12 ?    bright   Poor elongation
15P/Finlay                    12      fade     50 N to  5 S   dusk
10P/Tempel                    12.5 ?  bright   60 N to 55 S   best morning
Siding Spring (2013 A1)       12.5 ?  fade     65 N to 10 S   all night
Tenagra (2013 C2)             12.5    outburst 40 N to 85 S   best evening
PanSTARRS (2012 K1)           13      fade     Poor elongation
29P/Schwassmann-Wachmann      13 ?    varies   30 N to 85 S   best morning
22P/Kopff                     13.5 ?  bright   60 N to 50 S   best evening
Borisov (2014 R1)             13.5 ?  fade     40 N to 70 S   morning
Oukaimeden (2013 V5)          13.5 ?  fade     65 N to 25 S   all night
PanSTARRS (2012 F3)           13.5 ?  steady   45 N to 70 S   morning
32P/Comas Sola                14      fade     65 N to 30 S   best evening
PanSTARRS (2014 W11)          14      steady   45 N to 30 S   evening

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


Latest news

Apr. 24, 2015

“Crescent comet” – CometWatch 15 and 16 April

Just when we think we have seen Comet 67P/C-G from all possible angles under the current illumination conditions, a striking view like this presents itself.

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Apr. 24, 2015

CometWatch 15 April – 4 hours later

Today's CometWatch entry is another single frame NAVCAM image taken on 15 April, almost four hours after the one that was published last Friday. The new picture was obtained at about 165 km from the centre of Comet 67P/Churyumov-Gerasimenko, where the resolution of NAVCAM is 14 m/pixel. The image has been cropped and measures 10.4 km (the original frame, provided at the end of the post, measures 14.4 km across).

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Apr. 24, 2015

OSIRIS catches activity in the act

Rosetta’s scientific imaging system OSIRIS has witnessed a new jet of dust emerging from the surface of Comet 67P/Churyumov-Gerasimenko. The image was presented during the European Geosciences Union General Assembly, EGU, in Vienna last week.

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Mar. 31, 2015

New Comet: C/2015 F4 (JACQUES)

CBET nr. 4085, issued on 2015, March 31, announces the discovery of a comet (magnitude ~16) by C. Jacques on CCD images taken on 2015, March 27.2 by C. Jacques, E. Pimentel and J. Barros with a 0.28-m f/2.2 astrograph at the SONEAR Observatory (Oliveira, Brazil). The new comet has been designated C/2015 F4 (JACQUES).

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Mar. 31, 2015

CometWatch 22 March

This single frame Rosetta Navigation Camera image was taken on 22 March 2015 at a distance of 77.8 km from the centre of Comet 67P/C-G. The image scale is 6.6 m/pixel and the 1024 x 1024 pixel image measures 6.8 km across.

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