Near-Infrared Colors of the Binary Kuiper Belt Object 1998 WW31

Details Near-Infrared Colors of the Binary Kuiper Belt Object 1998 WW31 Near-Infrared Colors of the Binary Kuiper Belt Object 1998 WW31

Jun 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003em%26p...92..183t&link_type=abstract

Earth, Moon, and Planets, v. 92, Issue 1, p. 183-191 (2003).

Physics

Optics

Scientific paper

We have measured near-infrared colors of the binary Kuiper Belt object (KBO) 1998 WW31 using the Subaru Telescope with adaptive optics. The satellite was detected near its perigee and apogee (0.18'' and 1.2'' apart from the primary). The primary and the satellite have similar H-K colors, while the satellite is redder than the primary in J-H. Combined with the R band magnitude previously published by Veillet et al., 2002, the color of the primary is consistent with that of optically red KBOs. The satellite's R-, J-, H-colors suggest the presence of ~1 μm absorption band due to rock-forming minerals. If the surface of the satellite is mainly composed by olivine, the satellite's albedo is higher value than the canonically assumed value of 4%.

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