3494 Purple Mountain

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3494 Purple Mountain
Discovery
Discovered by Purple Mountain Observatory
Discovery date December 7, 1980
Designations
Named after Purple Mountain Observatory
Alternative names 1980 XW; 1962 WV1;
1969 UD; 1972 OA
Minor planet category Main belt (Vesta family)
Orbital characteristics
Epoch November 26, 2005 (JD 2453700.5)
Aphelion 397.281 Gm (2.656 AU)
Perihelion 305.825 Gm (2.044 AU)
Semi-major axis 351.553 Gm (2.350 AU)
Eccentricity 0.130
Orbital period 1315.820 d (3.60 a)
Average orbital speed 19.35 km/s
Mean anomaly 86.279°
Inclination 5.837°
Longitude of ascending node 234.559°
Argument of perihelion 72.282°
Physical characteristics
Temperature ~182 K (estimate)
Spectral type V-type asteroid
Absolute magnitude (H) 12.7

3494 Purple Mountain is a small asteroid in the asteroid belt. It is not purple; its unusual name comes from the Purple Mountain Observatory in China, where it was rediscovered in 1980. (It had been seen but lost several times since 1962. See lost asteroids.)

Purple Mountain is a vestoid, a fragment blasted off the giant asteroid 4 Vesta by the impact that formed the Vestian collisional family. A spectroscopic analysis showed it to have a composition very similar to the cumulate eucrite meteorites[1].