Surface Photometry of Comet Hale-Bopp Carbon Images

Details Surface Photometry of Comet Hale-Bopp Carbon Images Surface Photometry of Comet Hale-Bopp Carbon Images

Jul 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997em%26p...78..137s&link_type=abstract

Earth, Moon, and Planets, v. 78, Issue 1/3, p. 137-142 (1997).

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Carbon Emission Images, Comet Hale-Bopp, Surface Photometry

Scientific paper

A very long series of photographic observations of the comet Hale-Bopp has been made during January April 1997 at the double astrograph (400/2000) of the Main Astronomical Observatory (Kyiv, Ukraine). Some of the cometary photos were obtained with two wide-band filter combinations. One of these combinations isolates C2 emission, another — the nearby dust continuum. The images were digitized by means of AMDPH-XY machine and then calibrated following the standard procedure. After subtraction of the dust continuum the distribution of surface brightness in the C2 emission coma of comet Hale-Bopp was studied. We found an asymmetric brightness distribution both pre- and post-perihelion. On 21.77 April 1997 a secondary brightness peak is found at the distance of 1.03 × 105 km from the nucleus. It is possible that this peak is related to the extended source of the C2 molecules.

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