Optical spectrophotometry of comet Tempel 2 far from the sun

Details Optical spectrophotometry of comet Tempel 2 far from the sun Optical spectrophotometry of comet Tempel 2 far from the sun

Oct 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pasp...91..707s&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 91, Oct.-Nov. 1979, p. 707-711.

Astronomy and Astrophysics

Astronomy

16

Albedo, Astronomical Photometry, Comet Nuclei, Spaceborne Astronomy, Spectrophotometry, Mission Planning, Optical Properties, Solar System

Scientific paper

With the advent of mission planning for spacecraft encounters with comets in the 1980s, the lack of basic data on cometary nuclei has become quite apparent and a real problem. More effort is needed on all comets, with special attention given to probable space flight targets such as Tempel 2. The paper presents medium-spectral-resolution spectrophotometry of P/Tempel 2, made at heliocentric distances of 2.66 and 3.02 AU on two dates in 1978. It is shown that optical spectrophotometry of comet Tempel 2 near 3 AU heliocentric distance places strict limits on its activity, the modeled CN production rate having an upper limit of 6 times 10 to the 21st molecules per sec. The observations of P/Tempel 2 are compatible with a bare nucleus of 1.6 km radius (geometric albedo = 0.15) and somewhat redder than the sun.

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