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Sunao Hasegawa, Seidai Miyasaka, Hiroyuki Mito, Yuki Sarugaku, Tomohiko Ozawa, Daisuke Kuroda, Setsuko Nishihara, Akari Harada, Michitoshi Yoshida, Kenshi Yanagisawa, Yasuhiro Shimizu, Shogo Nagayama, Hiroyuki Toda, Kichi Okita, Nobuyuki Kawai, Machiko Mori, Tomohiko Sekiguchi, Masateru Ishiguro, Takumi Abe, Masanao Abe, Lightcurve survey of V-type asteroids in the inner asteroid belt, Publications of the Astronomical Society of Japan, Volume 66, Issue 3, June 2014, 54, https://doi.org/10.1093/pasj/psu040
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Abstract
We observed the lightcurves of 13 V-type asteroids [(1933) Tinchen, (2011) Veteraniya, (2508) Alupka, (3657) Ermolova, (3900) Knezevic, (4005) Dyagilev, (4383) Suruga, (4434) Nikulin, (4796) Lewis, (6331) 1992 FZ1, (8645) 1998 TN, (10285) Renemichelsen, and (10320) Reiland]. Using these observations we determined the rotational rates of the asteroids, with the exception of Nikulin and Renemichelsen. The distribution of rotational rates of 59 V-type asteroids in the inner main belt, including 29 members of the Vesta family, which are regarded as being ejecta from the asteroid (4) Vesta, is inconsistent with the best-fit Maxwellian distribution. This inconsistency may be due to the effect of thermal radiation Yarkovsky–O’Keefe–Radzievskii–Paddack (YORP) torques, which implies that the collision event that formed V-type asteroids is sub-billion to several billion years in age.