36th DPS Meeting, 8-12 November 2004
Session 32 Asteroids
Poster II, Thursday, November 11, 2004, 4:15-7:00pm, Exhibition Hall 1A

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[32.07] Physical Characteristics of the Binary PHA 2003 YT1

S.M. Larson (LPL, Univ. Arizona), A.D. Grauer (Univ. Ark. Little Rock), E. Beshore, E. Christensen (LPL, Univ. Arizona), P. Pravec (Ondrejov Obs.), M. Kaasalainen (Univ. Helsinki), M.C. Nolan, E.S. Howell, A.A. Hine (NAIC), A. Galad, B.S. Gajdos, C.L. Kornos, D.J. Vilagi (Modra Obs.)

We present the results of a comprehensive effort to measure physical characteristics of 2003 YT1 during its close earth approach in April-May, 2004. The 2.34 hour rotation period can be seen in several nights of time series photometry during which the peak to peak amplitude varied as the observing geometry changed. The binary nature was noted in the Modra Observatory light curve of April 22.99UT, but observed directly in delay-Doppler images on May 1-4 (IAUC 8336, and Nolan et al., this meeting). We compare features seen in the radar images with the light curve.

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Bulletin of the American Astronomical Society, 36 #4
© 2004. The American Astronomical Soceity.