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!

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/2013 US10 (Catalina) (Jul 27, 2015).

Recent observations

Type  Comet name  Obs date       Mag     Dia   DC  Tail     Observer
  V      2014Q1   2015 07 29.35   7.6     2.7  5/  30.0m115 WYAab
  V      2015F4   2015 07 29.01  10.9     1.3  3/           MEY  
  V      2014Q1   2015 07 28.91   6.5:    5    4            AMO01
  V    88         2015 07 28.76  12.0     2.5  1            CAM03
  V      2013US10 2015 07 28.75   7.7     7    6    5.0m350 CAM03
  C      2013US10 2015 07 28.68   8.6     1.32 4            PAUaa
  V      2014Q1   2015 07 28.34   6.7     5    4            CAM03
  V    67         2015 07 27.79  12.9     0.9  3/           WYAab
  V    88         2015 07 27.78  12.0     2.8  1            CAM03
  V      2013US10 2015 07 27.77   7.8     6    6    5.0m350 CAM03
  V    88         2015 07 27.75  11.5     3.2  2/           WYAab
  V      2013US10 2015 07 27.72   7.7    11.2  5            WYAab
  V      2015F4   2015 07 27.71  11.9     0.8  2/           WYAab
  V      2014Q1   2015 07 27.36   6.7     6.2  5   28.0m120 WYAab
  V      2014Q1   2015 07 27.34   6.4     6    4            CAM03

                            

Comet Observing Planner

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Current comet magnitudes (July 20)

Comet                     Magnitude   Trend    Observable     When visible
PanSTARRS (2014 Q1)            5.5    fade     15 N to 70 S   early evening
Catalina (2013 US10)           8.5    bright   25 N to 90 S   all night
Lovejoy (2014 Q2)              9.5    fade     55 N to 10 S   all night
Jacques (2015 F4)             10.5    steady   55 N to 50 S   all night
88P/Howell                    10.5    outburst 50 N to 55 S   early morning
MASTER (2015 G2)              11      fade     Conjunction
19P/Borelly                   11 ?    fade     Conjunction
22P/Kopff                     12.5    steady   40 N to 65 S   evening
29P/Schwassmann-Wachmann      13 ?    varies   35 N to 90 S   best evening
Spacewatch (2011 KP36)        13.5 ?  bright   50 N to 50 S   morning
PanSTARRS (2012 F3)           13.5 ?  steady   50 N to 70 S   best morning
PanSTARRS (2012 K1)           13.5    fade     30 N to 75 S   morning
10P/Tempel                    14 ?    bright   50 N to 65 S   early evening
Tenagra (2013 C2)             14      outburst 20 N to 80 S   evening

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


Latest news

Jul. 24, 2015

Video report: Rosetta orbiter science

It is almost a year since the Rosetta spacecraft began orbiting comet 67P/Churyumov-Gerasimenko on 6 August 2014. The orbiter’s eleven instruments are studying the comet at different wavelengths - infrared, ultraviolet, microwave and radio – as well as gathering high-resolution images and information about its shape, density, temperature and chemical composition.

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Jul. 23, 2015

Inside Imhotep

Imhotep, on Comet 67P/Churyumov-Gerasimenko's large lobe, is one of the most geologically diverse regions observed by Rosetta. This blog post presents the results of a new paper by Anne-Thérèse Auger from the Laboratoire d'Astrophysique de Marseille (LAM, France) et al, which describes Imhotep's key features and discusses possible scenarios for this region's evolution. The post was prepared with inputs from Anne-Thérèse and co-author Olivier Groussin, also from LAM.

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Jul. 23, 2015

CometWatch 14 July

Today’s CometWatch entry was captured by Rosetta’s NAVCAM on 14 July 2015 from a distance of 161 km from the centre of Comet 67P/Churyumov-Gerasimenko. The image scale is 13.7 m/pixel and the image measures 14 km across.

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Jul. 16, 2015

Getting to know Rosetta’s comet: boundary conditions

In January the first maps of Comet 67P/Churyumov-Gerasimenko were published, identifying 19 geomorphologically distinct regions on its surface. Six months on and much more work has been done on refining the boundaries between these regions. This blog post showcases some of the OSIRIS images acquired from close orbit and presented in a new paper that have enabled an in-depth study of the different regions and their boundaries. This post was prepared with inputs from lead author M. Ramy El-Maarry from the University of Bern, who introduces this post with an inside story on how some of the regional names were chosen:

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Jul. 16, 2015

CometWatch 7 July

Today’s CometWatch entry was taken on 7 July, from a distance of 154 km from Comet 67P/Churyumov-Gerasimenko. The image resolution is 13.1 m/pixel and the image measures 13.4 km across.

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