Post-perihelion observations of P/Halley. III - an outburst at R = 14.3 AU

Details Post-perihelion observations of P/Halley. III - an outburst at R = 14.3 AU Post-perihelion observations of P/Halley. III - an outburst at R = 14.3 AU

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246l..77w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 2, June 1991, p. L77-L80.

Astronomy and Astrophysics

Astrophysics

33

Astronomical Photometry, Comet Nuclei, Cometary Atmospheres, Halley'S Comet, Charge Coupled Devices, Interplanetary Dust, Solar System

Scientific paper

Results are presented of postperihelion observations of P/Halley in February 1990 (at heliocentric distance r = 12.5 AU) and February-April 1991 (at r = 14.3-14.6 AU. It was found that, whereas in 1990 no extended coma could be detected, a large coma was observed in February 12, 1991, persisting until mid-April, indicating that a major outburst must have taken place between the two observation periods. This paper presents a preliminary description of the morphology of the cloud and its evolution.

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