Rotation and photometric properties of E-type asteroids

Details Rotation and photometric properties of E-type asteroids Rotation and photometric properties of E-type asteroids

Aug 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003p%26ss...51..525s&link_type=abstract

Planetary and Space Science, Volume 51, Issue 9-10, p. 525-532.

Physics

7

Scientific paper

The results of photometric observations of seven E-type asteroids 64 Angelina, 214 Aschera, 1025 Riema, 1103 Sequoia, 1251 Hedera, 2035 Stearns, and 2248 Dwornik are presented. New rotation periods have been determined for asteroids 1025 Riema (6.557+/-0.001h), 1251 Hedera (15.015+/-0.010h), 2035 Stearns (85.0+/-0.1h), and 2048 Dwornik (3.664+/-0.001h). Two new poles have been estimated for 214 Aschera /(274+/-8° /64+/-4°) and 1025 Riema /(141+/-10°, /11+/-6°) and pole has been redefined for 64 Angelina /(138+/-10°, /31+/-5°). Using all available data on rotation periods, the spin rates of E-type asteroids have been analyzed. The distribution of the spin rates has maximum corresponding to the period of about 6.2h. The shapes of E-asteroids are more elongated than the shapes of small-size S-asteroids. The average values of color indexes, albedo and G parameter for E-type asteroids have also been determined.

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