3494 Purple Mountain

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3494 Purple Mountain
Discovered by Purple Mountain Observatory
Discovery date 7 December 1980
MPC designation (3494) Purple Mountain
Named after
Purple Mountain Observatory
1980 XW; 1962 WV1;
1969 UD; 1972 OA
Main belt (Vesta family)
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 23355 days (63.94 yr)
Aphelion 2.65710 AU (397.497 Gm)
Perihelion 2.04260 AU (305.569 Gm)
2.34985 AU (351.533 Gm)
Eccentricity 0.13075
3.60 yr (1315.7 d)
19.35 km/s
0° 16m 25.021s / day
Inclination 5.83091°
Earth MOID 1.03507 AU (154.844 Gm)
Jupiter MOID 2.55355 AU (382.006 Gm)
Jupiter Tisserand parameter 3.540
Physical characteristics
Temperature ~182 K (estimate)
V-type asteroid

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, as 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.[2]


  1. ^ "3494 Purple Mountain (1980 XW)". JPL Small-Body Database. NASA/Jet Propulsion Laboratory. Retrieved 14 April 2016. 
  2. ^ Kelley, Michael S.; Vilas, Faith; Gaffey, Michael J.; Hicks, Anthony; Abell, Paul A.; Lederer, Susan M., "Mineralogical Analyses of Two Small Vesta Family Asteroids", SAO/NASA ADS—Astronomy Abstract Service, retrieved 22 August 2015 

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