Physical studies of asteroids. XXXIII. The spin rate of M-type asteroids

Details Physical studies of asteroids. XXXIII. The spin rate of M-type asteroids Physical studies of asteroids. XXXIII. The spin rate of M-type asteroids

Jul 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26as..131...55l&link_type=abstract

Astronomy and Astrophysics Supplement, v.131, p.55-62

Astronomy and Astrophysics

Astrophysics

8

Asteroids

Scientific paper

The results from photometric lightcurve observations of nine M-type asteroids are presented. New rotation periods were determined for 6 asteroids: 217 Eudora (12.54 h), 322 Phaeo (17.56 h), 572 Rebekka (5.65 h), 757 Portland (6.58 h), 857 Glasenappia (8.23 h) and 872 Holda (7.20 h). B-V colour measurements of seventeen previously unclassified asteroids add seven asteroids to the known M-type population. An excess of fast rotators among M-type asteroids compared to asteroids of other taxonomic types is evident. The six asteroids with slow spin rates, but hitherto classified as M, are shown to have classification parameters untypical for the M-type population. Partly based on observations collected at the European Southern Observatory, La Silla, Chile.

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