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 228000 comet observations of more than 1200 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.
Type Comet name Obs date Mag Dia DC Tail Observer V 41 2017 02 25.80 10.7 2.8 3 BOH02 C 41 2017 02 25.23 10.1 8.2 RAMaa C 2016VZ18 2017 02 25.15 14.3 1.2 RAMaa V 2015V2 2017 02 25.00 9.7 4 5 GUZ V 2015V2 2017 02 24.99 10.3 2 6 0.15 300 GUZ V 45 2017 02 24.98 8.4 &15 2 0.5 250 GUZ V 41 2017 02 24.97 10.2 6 3 GUZ V 41 2017 02 24.96 9.8 10 3 GUZ V 2015V2 2017 02 24.94 [10.3 ! 2 BIEaa V 45 2017 02 24.93 10.0: & 5 1 MEY V 45 2017 02 24.93 [10.2 ! 5 BIEaa V 41 2017 02 24.91 10.9 2.5 3 MEY V 2015V2 2017 02 24.90 10.8 0.9 4 3.0m335 HAR11 V 45 2017 02 24.89 9.0 5.5 1 15.0m290 HAR11 V 41 2017 02 24.81 11.1 2.6 3 HAR11
Comet Magnitude Trend Observable When visible 45P/Honda-Mrkos-Pajdusakova 7.5 fade 90 N to 45 S best morning PanSTARRS (2015 ER61) 10 bright 50 N to 60 S early morning 2P/Encke 10 bright 75 N to 10 S evening Johnson (2015 V2) 10.5 bright 90 N to 25 S best morning NEOWISE (2016 U1) 11 fade Poor elongation 41P/Tuttle-Giacobinni-Kresak 12 bright 75 N to 50 S best morning 73P/Schwassmann-Wachmann 12.5 bright 30 N to 40 S early morning PanSTARRS (2016 R2) 13 ? bright 25 N to 55 S evening 29P/Schwassmann-Wachmann 13 ? varies In conjunction 315P/LONEOS 13.5 steady 70 N to 10 S morning 237P/LINEAR 13.5 fade In conjunction Spacewatch (2011 KP36) 13.5 fade 40 N to 20 S early evening 43P/Wolf-Harrington 14 fade 25 N to 60 S morning
List of comets maintained by Jonathan Shanklin at http://www.ast.cam.ac.uk/~jds.
Thierry Noel has reported that Comet 73P/Schwassmann-Wachmann is showing a second component in images taken remotely from Chile (Observers: A. Maury, B. Sandness, T. Noel). Follow-up images taken by Andre Debackere using the Las Cumbres Observatory 1.0-m telescope at Siding Spring, Australia and measured by Richard Miles show that the main comet is accompanied by a much brighter secondary component surrounded by a faint coma.
For the first time, scientists using NASA's Hubble Space Telescope have witnessed a massive object with the makeup of a comet being ripped apart and scattered in the atmosphere of a white dwarf, the burned-out remains of a compact star. The object has a chemical composition similar to Halley's Comet, but it is 100,000 times more massive and has a much higher amount of water. It is also rich in the elements essential for life, including nitrogen, carbon, oxygen, and sulfur.
In September 2015, a team of astronomers successfully observed the entire hydrogen coma of the comet 67P/Churyumov-Gerasimenko, using the LAICA telescope onboard the PROCYON spacecraft. They also succeeded in obtaining the absolute rate of water discharge from the comet. Through our observations, we were able to test the coma models for the comet for the first time. This result is the first scientific achievement by a micro spacecraft for deep space exploration.
CBET nr. 4344, issued on 2017, January 11, announces the discovery of a comet (magnitude ~18.2) by L. Elenin on three CCD images obtained with 0.4-m f/2.4 reflector + CCD at the ISON-SSO Observatory at Siding Spring on Jan. 5.4 UT. The new comet has been designated C/2017 A3 (Elenin).
Interstellar forecast for a nearby star: Raining comets! NASA's Hubble Space Telescope has discovered comets plunging onto the star HD 172555, which is a youthful 23 million years old and resides 95 light-years from Earth.