P/Halley - First signs of activity?

Details P/Halley - First signs of activity? P/Halley - First signs of activity?

May 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...121l..11w&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 121, no. 1, May 1983, p. L11, L12.

Astronomy and Astrophysics

Astronomy

16

Comet Nuclei, Halley'S Comet, Astrometry, Astronomical Photometry, Comets, Halleys, Astronomy, Observations, Brightness, Photographs, Imagery, Ccd Imaging, Astrometry, Data

Scientific paper

A comparison of two broad-band CCD exposures (3700-7800 Å) of P/Halley (1982i) on 10 December 1982 and 14 January 1983, with the Danish 1.5 m telescope on La Silla, indicates a brightness increase of 1.0 ± 0.4 mag. The January image is broader than the seeing disc, although this may partly be a guiding effect. It is possible that the first signs of nuclear activity have been observed at ≡10.5 AU. Accurate positions have been measured.

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