Veritas Asteroid Family: Remarkable Spectral Differences Inside a Primitive Parent Body

Details Veritas Asteroid Family: Remarkable Spectral Differences Inside a Primitive Parent Body Veritas Asteroid Family: Remarkable Spectral Differences Inside a Primitive Parent Body

May 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997icar..127..112d&link_type=abstract

Icarus, Volume 127, Issue 1, pp. 112-120.

Mathematics

Probability

18

Scientific paper

In this paper we report first optical reflectance spectra in the wavelength range 3800-9000 A for seven members of the Veritas asteroid family, as determined by V. Zappala, A. Cellino, P. Farinella, and A. Milani (1994, Astron. J. 116, 291-314). The observed asteroids are 490 Veritas, 844 Leontina, 1086 Nata, 2428 Kamenyar, 2934 Aristophanes, 5592 Oshima, and 1985 TQ_1. In addition, we also observed the object 5107 1987 DS_6, which joins the Veritas family when a slightly more relaxed criterion of selection is adopted. The obtained spectra show a surprising slope gradient spanning from 0 to about 8%, a range that includes the slopes characteristics of all the low-albedo, primitive bodies (from C to D type). Taking into account the very compact structure of the family-the probability of finding interlopers inside the defined clustering is practically zero-this result seems to confirm the suggestion by F. Vilas and M. V. Sykes (1996, Icarus, 124, 483-489) about the presence of thermally altered large asteroids inside the outer belt population; however, the hypothesis of possible space weathering processes cannot be completely ruled out. A tentative representation of the postimpact velocity field has been also obtained, showing a possible peculiar ejection of the fragments.

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