Radar Observations Of Comet 73P/Schwassmann-Wachmann 3

Details Radar Observations Of Comet 73P/Schwassmann-Wachmann 3 Radar Observations Of Comet 73P/Schwassmann-Wachmann 3

Sep 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006dps....38.1206n&link_type=abstract

American Astronomical Society, DPS meeting #38, #12.06; Bulletin of the American Astronomical Society, Vol. 38, p.504

Astronomy and Astrophysics

Astronomy

4

Scientific paper

We observed comet 73P using the Arecibo (12.6 cm) and Goldstone (3.5 cm) planetary radar systems on 10 nights in May 2006. We obtained radar spectra and images of both the comæ and nuclei of fragments B and C.
73P is only the second comet whose nuclei have been imaged with radar and the first at sub-50-m resolution. We also obtained the first delay-Doppler maps of a comet's coma.
We obtained images of the nuclei at resolutions as fine as 15 m per pixel.
Based on the visible extent of the nucleus images, fragment C is at least 1 km in diameter and fragment B is at least 400 m in diameter.
Both fragments are irregular in shape and have rotation periods longer than 10 hours.
The coma echoes revealed velocity distributions that are size-dependent: smaller particles are moving at higher velocities.
The Arecibo Observatory is part of the National Astronomy and Ionosphere Center, which is operated by Cornell University under a cooperative agreement with the National Science Foundation.

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