631 Philippina is a minor planet orbiting the Sun that was discovered by German astronomer August Kopff on March 21, 1907. Photometric of this asteroid made in 1981 gave a light curve with a period of 5.92 ± 0.01 hours with a brightness variation of 0.20 in magnitude. In 2007 lightcurve data showed that it rotates every 5.899 ± 0.001 hours. See also List of minor planets: 1–1000 References External links Background asteroids Philippina Philippina S-type asteroids (Tholen) S-type asteroids (SMASS) 19070321