631 Philippina is a minor planet orbiting the Sun that was discovered by German astronomer August Kopff on March 21, 1907.

631 Philippina
A three-dimensional model of 631 Philippina based on its light curve
Discovery
Discovered byAugust Kopff
Discovery siteHeidelberg
Discovery date21 March 1907
Designations
(631) Philippina
1907 YJ
Orbital characteristics[1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc109.08 yr (39842 d)
Aphelion3.0226 AU (452.17 Gm)
Perihelion2.5641 AU (383.58 Gm)
2.7933 AU (417.87 Gm)
Eccentricity0.082065
4.67 yr (1705.2 d)
217.70°
0° 12m 39.996s / day
Inclination18.917°
224.709°
277.857°
Physical characteristics
28.825±0.6 km
5.899 h (0.2458 d)
0.1760±0.008
8.70

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.[2] In 2007 lightcurve data showed that it rotates every 5.899 ± 0.001 hours.[3]

See also

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References

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  1. ^ Yeomans, Donald K., "631 Philippina", JPL Small-Body Database Browser, NASA Jet Propulsion Laboratory, retrieved 5 May 2016.
  2. ^ Schober, H. J. (July 1983), "The large C-type asteroids 146 Lucina and 410 Chloris, and the small S-type asteroids 152 Atala and 631 Philippina - Rotation periods and lightcurves", Astronomy and Astrophysics Supplement Series, vol. 53, pp. 71–75, Bibcode:1983A&AS...53...71S.
  3. ^ Buchheim, Robert K. - Lightcurves for 122 Gerda, 217 Eudora, 631 Phillipina, 670 Ottegebe, and 972 Cohnia (2007)
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