Variability of P/Halley

Physics – Optics

Scientific paper

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Astrometry, Astronomical Photometry, Halley'S Comet, Cassegrain Optics, Charge Coupled Devices, Image Processing, Telescopes, Variability, Comets, Halley, Photometry, Magnitude, Astronomy, Observations, Periods, Rotation, Astrometry, Short Period Comets, Procedure, Data

Scientific paper

Twenty-one photometric magnitudes of P/Halley (1982 i) have been measured on Jan. 27-30, 1984 with the Danish 1.5 m telescope at La Silla and a CCD. They have r.m.s. of + or 0.2 mag, and show night-to-night variability. The available material does not allow an unambiguous determination of a period of rotation, but short periods (not greater than 10 hours) are considered less likely.

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