632 Pyrrha is a minor planet orbiting the Sun.

632 Pyrrha
Modelled shape of Pyrrha from its lightcurve
Discovery
Discovered byAugust Kopff
Discovery siteHeidelberg
Discovery date5 April 1907
Designations
(632) Pyrrha
Pronunciation/ˈpɪrə/,[1]
1907 YX
Orbital characteristics[2]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 0
Observation arc109.03 yr (39823 d)
Aphelion3.1695 AU (474.15 Gm)
Perihelion2.1583 AU (322.88 Gm)
2.6639 AU (398.51 Gm)
Eccentricity0.18979
4.35 yr (1588.1 d)
33.9510°
0° 13m 36.084s / day
Inclination2.2156°
356.505°
252.767°
Physical characteristics
4.1167 h (0.17153 d)
11.4

Photometric observations of the minor planet in 2011 gave a rotation period of 4.1167±0.001 h with an amplitude of 0.40±0.04 in magnitude. This result rules out previous determinations of the period.[3]

References

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  1. ^ "Pyrrhic". Oxford English Dictionary (Online ed.). Oxford University Press. (Subscription or participating institution membership required.)
  2. ^ "632 Pyrrha (1907 YX)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 5 May 2016.
  3. ^ Pilcher, Frederick (July 2011), "Rotation Period Determinations for 28 Bellona, 81 Terpsichore, 126 Velleda 150 Nuwa, 161 Athor, 419 Aurelia, and 632 Pyrrha", The Minor Planet Bulletin, 38 (3): 156–158, Bibcode:2011MPBu...38..156P.
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