The nucleus of Comet P/Tempel 2

Details The nucleus of Comet P/Tempel 2 The nucleus of Comet P/Tempel 2

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...347.1155a&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 347, Dec. 15, 1989, p. 1155-1166. Research supported by the University of A

Astronomy and Astrophysics

Astrophysics

66

Astronomical Photometry, Brightness Distribution, Comet Nuclei, Tempel 2 Comet, Albedo, Asteroids, Coma, Infrared Radiometers, Light Curve, Periodic Variations

Scientific paper

Simultaneous optical photometry and IR radiometry of Comet P/Tempel 2 are presented. Periodic variations of brightness are present and in phase at all wavelengths. Because the optical and thermal rotational light curves are in phase, it is concluded that the variations are caused by the changing apparent cross section of an elongated nucleus rotating with a period near 8.9 h. The variation of flux with aperture makes it possible to separate the contributions of the nucleus and the coma. The contribution by the coma is about 25 percent at maximum light in the optical and undetectable at the level of 10 percent at all times in the thermal IR.

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