A precise spin period for P/Halley

Details A precise spin period for P/Halley A precise spin period for P/Halley

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.599b&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 599-603 (SEE N87

Physics

9

Comet Nuclei, Halley'S Comet, Light Curve, Periodic Variations, Spin Dynamics, Algorithms, Brightness Distribution, Harmonic Analysis, Satellite Imagery

Scientific paper

The authors investigate observed fluctuations in the brightness of P/Halley when it was further than 5 AU from the sun for evidence of nuclear rotation. Only data of the highest photometric quality is used and the search for periodicity is limited to the range of periods allowed by Vega and Giotto images. The search algorithm is based on a three component harmonic model which serves to improve the physical interpretation of the results as well as providing an effective filter against many spurious responses to noise and possible aperiodic variability in the data. The authors find two acceptable periods between which they are unable to choose: 53 h 58 m ± 2 m; and 54 h 07 m ± 2 m.

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