Photometric investigations of distant comets C/2002 VQ94 (LINEAR) and 29P/Schwassmann-Wachmann-1 |
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| Authors: | A V Ivanova P P Korsun V L Afanasiev |
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| Institution: | 1.Main Astronomical Observatory of the National Academy of Sciences of Ukraine,Kyiv,Ukraine;2.Special Astrophysical Observatory,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | We present an analysis of the results of photometric investigations of two distant comets, C/2002 VQ94 (LINEAR) and 29P/Schwassmann-Wachmann-1,
obtained with the 6-m telescope of the Special Astrophysical Observatory of the Russian Academy of Sciences. The comets under
study demonstrate sufficient activity out of the zone of water ice sublimation (at heliocentric distances longer than 5 AU).
In the spectra of the investigated comets, we found the CO+ and N2+ emission. The presence of this emission may say that the comets were formed in the outer parts of the Solar System, in a
protoplanetary cloud at a temperature ≤25 K. We found that the photometric maximum of the ionosphere (in the CO+ filter) of the comet C/2002 VQ94 (LINEAR) is shifted relative to the photometric center of the dust coma by 1.4″ (7.44 ×
103 km) in the direction deflected by 63° from the direction to the Sun. Using special filters to process the images, we picked
out active structures (jets) in the dust coma of the 29P/Schwassmann-Wachmann-1 comet. |
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