A spectral comparison of (379) Huenna and its satellite

Details A spectral comparison of (379) Huenna and its satellite A spectral comparison of (379) Huenna and its satellite

2011-02-08

arxiv.org/abs/1102.1623v1

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

6 pages, 4 figures, 2 tables - Accepted for publication in Icarus

Scientific paper

We present near-infrared spectral measurements of Themis family asteroid (379) Huenna (D~98 km) and its 6 km satellite using SpeX on the NASA IRTF. The companion was farther than 1.5" from the primary at the time of observations and was approximately 5 magnitudes dimmer. We describe a method for separating and extracting the signal of a companion asteroid when the signal is not entirely resolved from the primary. The spectrum of (379) Huenna has a broad, shallow feature near 1 {\mu}m and a low slope, characteristic of C-type asteroids. The secondary's spectrum is consistent with the taxonomic classification of C-complex or X-complex. The quality of the data was not sufficient to identify any subtle feature in the secondary's spectrum.

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