Albedo heterogeneity on the surface of (1943) Anteros

Details Albedo heterogeneity on the surface of (1943) Anteros Albedo heterogeneity on the surface of (1943) Anteros

2009-12-28

arxiv.org/abs/0912.5201v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

Accepted to Icarus, 15 pages, 3 figs

Scientific paper

We have investigated the effect of rotation on the polarization of scattered light for the near-Earth asteroid (1943) Anteros using the Dual Beam Imaging Polarimeter on the University of Hawaii's 2.2 m telescope. Anteros is an L-type asteroid that has not been previously observed polarimetrically. We find weak but significant variations in the polarization of Anteros as a function of rotation, indicating albedo changes across the surface. Specifically, we find that Anteros has a background albedo of p_v = 0.18 +/- 0.02 with a dark spot of p_v < 0.09 covering < 2% of the surface.

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