Lightcurve of (4507) 1990 FV

We observed the main-belt asteroid (4507) 1990 FV from 2002 November to December at three observatories in eastern Asia. Its synodic rotation period turned out to be 6.58 ± 0.04 h and its lightcurve amplitude was 0.40 ± 0.03 mag when reduced to zero solar phase angle. Since our observations covered a relatively large solar phase angle range (2.3-13.7 degrees), we were able to make a phase curve to estimate the absolute magnitude (H) and slope parameter (G) in the R band: HR = 11.64 ± 0.02, GR = 0.19 ± 0.05.