Rosetta space mission to Comet 67P/Churyumov--Gerasimenko

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Scientific paper

We present preliminary results of study of middle-resolution optical spectra of Comet 153P/Ikeya--Zhang obtained on May 5, 2002 with the help of the 2.12-m reflector of the Guillermo Haro Astrophysical Observatory. Emission lines of the molecules C2, C3, CN, NH2, CO (Asundi and triplet bands), and H2O+ are identified in these spectra. On the basis of the intensity distribution along the slit of the spectrograph in C2, C3, CN emission lines we determined the velocities expansion and life times of these molecules.

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