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 231000 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 2017O1 2017 10 22.87 9.4 6 2/ WAR01 V 2017O1 2017 10 22.84 10.1 4.2 3 COLac C 217 2017 10 22.32 14.8 1.1 2.0m269 MAS01 C 2017T1 2017 10 21.74 17.8 0.2 4 BUIaa V 2017O1 2017 10 21.23 [ 9.9 AGUaa C 2015ER61 2017 10 21.13 12.5 0.9 HILaa C 174 2017 10 21.10 16.8 0.2 HILaa C 355 2017 10 21.07 14.3 0.7 HILaa C 240 2017 10 20.01 14.3 1.2 0.8m 11 MAS01 V 29 2017 10 19.46 12.0 3.7 1 WYA V 2015V2 2017 10 19.45 12.2 1.7 2 WYA V 71 2017 10 19.45 13.1 1.5 2/ WYA V 2017O1 2017 10 19.27 [ 9.7 AGUaa C 95 2017 10 18.98 18.0 0.2 HILaa V 2017O1 2017 10 18.95 8.9 6 2/ KWI
Comet Magnitude Trend Observable When visible ASASSN (2017 O1) 8.5 steady 80 N to 40 S best morning 24P/Schaumasse 11 bright 65 N to 15 S morning Johnson (2015 V2) 11 fade 5 N to 70 S evening PanSTARRS (2015 ER61) 12 fade 80 N to 45 S best morning 71P/Clark 12 fade 25 N to 70 S evening 217P/LINEAR 13 fade 65 N to 40 S morning 29P/Schwassmann-Wachmann 13 ? varies 50 N to 70 S early evening PanSTARRS (2016 R2) 13.5 bright 70 N to 65 S morning Lemmon-Yeung-PanS (2015 VL62) 13.5 steady 50 N to 65 S early evening 62P/Tsuchinshan 14 bright 70 N to 20 S morning PanSTARRS (2015 O1) 14 steady 65 N to 10 S evening
List of comets maintained by Jonathan Shanklin at http://www.ast.cam.ac.uk/~jds.
Observations made with the Atacama Large Millimeter/submillimeter Array (ALMA) and ESA's Rosetta mission, have revealed the presence of the organohalogen Freon-40 in gas around both an infant star and a comet. Organohalogens are formed by organic processes on Earth, but this is the first ever detection of them in interstellar space. This discovery suggests that organohalogens may not be as good markers of life as had been hoped, but that they may be significant components of the material from which planets form.
Scientists analysing the final telemetry sent by Rosetta immediately before it shut down on the surface of the comet last year have reconstructed one last image of its touchdown site.
NASA's Hubble Space Telescope has photographed the farthest active inbound comet ever seen, at a whopping distance of 1.5 billion miles from the Sun (beyond Saturn's orbit). Slightly warmed by the remote Sun, it has already begun to develop an 80,000-mile-wide fuzzy cloud of dust, called a coma, enveloping a tiny, solid nucleus of frozen gas and dust. These observations represent the earliest signs of activity ever seen from a comet entering the solar system's planetary zone for the first time.
Astronomers have observed the intriguing characteristics of an unusual type of object in the asteroid belt between Mars and Jupiter: two asteroids orbiting each other and exhibiting comet-like features, including a bright coma and a long tail. This is the first known binary asteroid also classified as a comet.
Astronomers have focused the Hubble Space Telescope on an exoplanet that had already been seen losing its atmosphere, which forms an enormous cloud of hydrogen, giving the planet the appearance of a giant comet. During earlier observations, it was not possible to cover the whole cloud, whose shape was predicted by numerical simulations. Thanks to these new observations, the scientists have finally been able to confirm the initial predictions.