Mature and Fresh Surfaces on the Newborn Asteroid Karin

Details Mature and Fresh Surfaces on the Newborn Asteroid Karin Mature and Fresh Surfaces on the Newborn Asteroid Karin

Nov 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...615l.161s&link_type=abstract

The Astrophysical Journal, Volume 615, Issue 2, pp. L161-L164.

Astronomy and Astrophysics

Astronomy

16

Minor Planets, Asteroids, Solar System: General

Scientific paper

Here we report a near-infrared (J, H, and K bands) spectroscopy of 832 Karin, the brightest asteroid among the Karin cluster group, which is thought to be the remnants of a collisional breakup only 5.8 million years ago. The spectroscopic observation was performed by the Subaru telescope with the Cooled Infrared Spectrograph and Camera for OHS on 2003 September 14. For different rotational phases of Karin, we derived different spectra such as a reddened spectrum like that of an S-type asteroid and an unreddened spectrum like that of ordinary chondrite. Karin could be an impact fragment preserving an old surface and is probably one of the cone-shaped fragments at the low-velocity impact that formed the Karin cluster group. Our result supports the idea that S-type asteroids are parent bodies of ordinary chondrites.

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