Infrared Observations of Comet Hale Bopp (C/1995 O1) from Gurushikhar Observatory

Details Infrared Observations of Comet Hale Bopp (C/1995 O1) from Gurushikhar Observatory Infrared Observations of Comet Hale Bopp (C/1995 O1) from Gurushikhar Observatory

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998em%26p...81..111c&link_type=abstract

Earth, Moon, and Planets, v. 81, Issue 2, p. 111-121 (2000).

Physics

Albedo, Comets, Grains, Hale&Mdash, Bopp, Infrared

Scientific paper

During the recent apparition of comet Hale—Bopp (1995 O1) near infrared photometric observations were carried out in the J, H, K filter bands and also in the 3.0—3.4 μm region at the 1.2 m telescope at Gurushikkar, India. The effective temperature of the comet was substantially higher than the equilibrium blackbody temperature. A mean superheat value of 1.83 was derived in the post-perihelion phase which implies that a large fraction of the grain population are made up of small and hot grains with radii <0.5 μm. High albedo values of ˜0.4 were also derived in the scattering angle range 135° to 160° which could explain the unusual brightness of comet Hale—Bopp.

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