4057 Demophon (1985 TQ) is a Jupiter Trojan discovered on October 15 1985 by Bowell E. at Flagstaff.Photometric observations of this asteroid during 1994 were used to build a light curve showing a rotation period of 29.31 ± 0.07 hours with a brightness variation of 0.23 ± 0.01 magnitude.
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