5222 Ioffe (1980 TL13) is a main-belt asteroid discovered on October 11 1980 by Chernykh N. S. at Nauchnyj. It is the largest of the Palladian asteroids apart from Pallas itself.Photometric observations of this asteroid collected during 2006 show a rotation period of 19.4 ± 0.2 hours with a brightness variation of 0.27 ± 0.03 magnitude.
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