3494 Purple Mountain

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3494 Purple Mountain
Discovery 
Synodic rotation period
2.928±0.001 h (1⁄2-p.)[8]
5.857±0.001 h[9]
0.24 (assumed)[5]
0.347±0.035[6][7]
V (SMASS-I Xu)[3] · V [4]
S (assumed)[5]
S/SV (SDSS-MOC)[10]
12.7[2][5][7]

3494 Purple Mountain, provisional designation 1980 XW, is a bright Vestian

rotation period of 5.9 hours.[5]

Orbit and classification

Purple Mountain is a core member of the

402), a giant asteroid family and the largest family of stony asteroids in the main-belt.[5]

Purple Mountain orbits the Sun in the

semi-major axis of 2.35 AU). Its orbit has an eccentricity of 0.13 and an inclination of 6° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at Palomar Observatory in December 1951, or 29 years prior to its official discovery observation.[1]

Lost asteroid

Purple Mountain has been a

Crimea–Nauchnij in 1969 and 1972, when it was designated as 1969 UD and 1972 OA, respectively, but was subsequently lost with no follow-up observations until its official discovery at Nanking in 1980.[1]

Physical characteristics

Based on the Moving Object Catalog (MOC) of the Sloan Digital Sky Survey, Purple Mountain is a common, stony S-type asteroid, with a sequential best-type taxonomy of SV.[10] The Collaborative Asteroid Lightcurve Link (CALL) also assumes it to be a stony S-type.[5]

In the SMASS-I classification by Xu, the asteroid is a V-type. This agrees with its measured high albedo (see below) often seen among the core members of the Vesta family.[11]: 23  In 2013, a spectroscopic analysis showed it to have a composition very similar to the cumulate eucrite meteorites, which also suggests that the basaltic asteroid has originated from the crust of 4 Vesta.[4]

Rotation period

In June 2015, a rotational

U=2).[8] The results are in good agreement, apart from the fact that the latter is an alternative, monomodal solution with half the period of the former. CALL adopts the longer, bimodal period solution as the better result in its Lightcurve Data Base, due to the lightcurve's distinct amplitude and the small phase angle of the first observation.[5]

Diameter and albedo

According to the survey carried out by the

albedo of 0.347,[6][7] while CALL assumes an albedo of 0.24 – derived from the body's classification into the Flora family – and consequently calculates a larger diameter of 7.82 kilometers based on an absolute magnitude of 12.7.[5]

Naming

This

M.P.C. 22829).[12]

References

  1. ^ a b c d e f g "3494 Purple Mountain (1980 XW)". Minor Planet Center. Retrieved 15 May 2018.
  2. ^ a b c d "JPL Small-Body Database Browser: 3494 Purple Mountain (1980 XW)" (2018-04-20 last obs.). Jet Propulsion Laboratory. Retrieved 15 May 2018.
  3. ^ a b c "Asteroid 3494 Purple Mountain – Nesvorny HCM Asteroid Families V3.0". Small Bodies Data Ferret. Retrieved 26 October 2019.
  4. ^
    doi:10.1016/S0019-1035(03)00149-0
    .
  5. ^ a b c d e f g h i j "LCDB Data for (3494) Purple Mountain". Asteroid Lightcurve Database (LCDB). Retrieved 15 May 2018.
  6. ^
    S2CID 118745497
    .
  7. ^
    S2CID 35447010. (catalog
    )
  8. ^
    ISSN 1052-8091
    .
  9. ^
    ISSN 1052-8091
    .
  10. ^
    doi:10.1051/0004-6361/200913322. Retrieved 30 October 2019. (PDS data set)
  11. ^
    S2CID 119280014
    .
  12. ^ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 15 May 2018.

External links

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