Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987icar...70..566w&link_type=abstract
Icarus (ISSN 0019-1035), vol. 70, June 1987, p. 566-572.
Astronomy and Astrophysics
Astronomy
16
Asteroids, Astrometry, Astronomical Photometry, Light Curve, Planetary Rotation, Asteroids, Photometry, Radar Methods, Photoelectric Methods, Rotation, Period, 1986Da, Nefertiti, 1982Bb, 1983Rd, 1986Jk, 1986Ra, Brightness, C Asteroids, Classification, X Asteroids, Q Asteroids, S Asteroids, Earth Crossers, Earth-Based Observations, Astronomy, Lightcurves, Telescope Methods, Distribution, Amplitude, Description
Scientific paper
Photoelectric photometry of six Earth-approaching asteroids is presented. The selection criterion was that they were close enough in 1986 to be observed by radar. Rotation periods were obtained for 1986 DA, 3199, 3103, and 1983 RD. 1986 JK and 1986 RA showed no detectable brightness variations during the monitoring time on several nights each, and therefore were either seen pole-on or have long rotation periods. Asteroids 1986 JK and 1986 RA are of taxonomic class C, 1986 DA and 3103 of class X, 1983 RD of class Q, and only 3199 of the class S that was previously believed to be predominant among Earth-approaching asteroids.
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