Size estimates of some optically bright KBOs

Details Size estimates of some optically bright KBOs Size estimates of some optically bright KBOs

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...415..771a&link_type=abstract

Astronomy and Astrophysics, v.415, p.771-775 (2004)

Astronomy and Astrophysics

Astrophysics

28

Minor Planets, Radio Continuum: Solar System

Scientific paper

Seven recently detected optically ``bright'' Kuiper-Belt-Objects (KBOs) were observed at 250 GHz using the Max-Planck Millimeter Bolometer (MAMBO) array at the IRAM 30 m telescope. Only the optical binary KBO (47 171) 1999 TC36 was detected, whose components differ optically by Δ m ≈ 2 mag. Assuming that the derived mean geometric albedo of p = 0.05 is identical for both, the component diameters become 566 and 225 km. For the other six objects upper limits to their sizes and lower limits for their albedos were obtained. The geometric albedo, p, for (28978) Ixion is surprisingly large, ≥0.15. For a consistent comparison all published radio photometric data of KBOs and Centaurs were analyzed again: the average geometric albedo is found to be ≈0.08.

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