Astrometry and photometry of Comet Halley 1982i

Details Astrometry and photometry of Comet Halley 1982i Astrometry and photometry of Comet Halley 1982i

Feb 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pazh...12..149g&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 12, Feb. 1986, p. 149-155) Soviet Astronomy Letters (ISSN 0360-0327), vol. 12, Jan.-Feb

Astronomy and Astrophysics

Astronomy

Astrometry, Astronomical Photometry, Halley'S Comet, Comet Nuclei, Light Curve, Magnitude, Spectral Energy Distribution

Scientific paper

Results of astrometric and photometric observations of Halley's comet with an 1-m telescope are given. Photometric parameters M0 and n are determined. It is obtained that the brightness of the comet increased slowly (n ≈ 1) in the heliocentric distance range 11 - 8 a.u. and significantly more faster (n ≈ 6) in the range 8 - 4 a.u. This behaviour at large distances may be explained by formation of dust clouds, so that not the nucleus itself but a pseudo-nucleus is observed the size of which diminishes as the gas sublimation rate rises. At small distances the brightness is controlled by the common gas-and-dust atmosphere.

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