Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984aj.....89.1745g&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 89, Nov. 1984, p. 1745-1754. NASA-supported research.
Astronomy and Astrophysics
Astronomy
72
Comets, Iras-Araki-Alcock Comet, Radar Astronomy, Albedo, Backscattering, Circular Polarization, Power Spectra
Scientific paper
Radar echoes from Comet IRAS-Araki-Alcock at wavelengths 3.54 and 12.9 cm indicate that the comet's nucleus is very rough on a scale larger than the radar wavelengths; however, the low polarization ratio (25 percent at 3.54 cm) indicates that the scattering is not dominated by multiple reflections, internal reflections, or large abundances of sharp edges, cracks, and pits. The shape of the nucleus probably departs greatly from a sphere with average radii near 3-4 km. The nucleus does not appear to look significantly different from a number of Apollo and Amor asteroids except that: (1) there is a suggestion that minor structure moves rapidly across the spectra, and (2) the debris not gravitationally bound to the comet was detected, and contributes 25 percent of the total radar cross section at the 12.9-cm wavelength. Other considerations suggest that the pole was at least 45 deg away from the line of sight on two days of observation, and that the rotation period is approximately 1-2 days.
Goldstein Raymond M.
Jurgens Raymond F.
Sekanina Zdenek
No associations
LandOfFree
A radar study of Comet IRAS-Araki-Alcock 1983d does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A radar study of Comet IRAS-Araki-Alcock 1983d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A radar study of Comet IRAS-Araki-Alcock 1983d will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1751050