Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988plas.rept...67j&link_type=abstract
In NASA, Washington, Reports of Planetary Astronomy, p 67-68 (SEE N89-16624 08-89)
Astronomy and Astrophysics
Astronomy
Astronomical Photometry, Brightness, Dust, Halley'S Comet, Backscattering, Monte Carlo Method, Solar Radiation, Spatial Distribution, Water
Scientific paper
The physical properties of Comet P/Halley are being monitored from the ground using state of the art optical detectors. The long time base (1982-present) of the observations provides a unique record of the development of activity in a single comet. In addition, physical properties of other comets are measured to provide a reference against which Comet Halley may be compared. Results for the past year include: (1) publication of the first results on the surface brightness profiles of dust comets; (2) charge coupled device measurements of Comet Bowell show that the activity of comets can persist at least to heliocentric distances R = 13.6 AU; (3) a study of the back-scattering phase angle dependences of 5 comets (including Halley) shows evidence for small linear phase coefficients in each case; (4) temporal monitoring of P/Halley continues.
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