Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001pasj...53l..13y&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.53, No. 4, pp. L13-L16
Astronomy and Astrophysics
Astronomy
12
Minor Planets, Asteroids, Solar System: General, Techniques: Photometric
Scientific paper
We report on the first observations of sub-km main-belt asteroids (MBAs) obtained with the prime-focus mosaic CCD camera for the Subaru telescope. We detected 27 moving objects in a single image of the sky (field of view: 27'×27'), whose location was 41° off opposition. From their positions and projected motions on the sky, all of the detected objects were found to be new and consistent with the characteristic of MBAs. The V-magnitudes of the discovered asteroids range approximately from 19 to 24. Under some simple, but reasonable, assumptions, we estimated the cumulative size distribution for the asteroids. This is the first statistics for sub-km MBAs (the minimum diameter corresponds to about 0.6km). It is found that the slope of the cumulative size distribution for the observed asteroids is 1.0 with an error of about 0.3. We note that our slope is fairly smaller than that obtained in the past observational surveys for asteroids larger than a few kilometers (~1.75).
Fuse Tetsuharu
Komiyama Yutaka
Miyazaki Masayuki
Miyazaki Satoshi
Nakamura Tsuko
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