2012 Guo Shou-Jing

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2012 Guo Shou-Jing
Discovery
Synodic rotation period
12 h[10]
0.030±0.006[6]
0.035±0.041[8]
0.04±0.04[9]
0.04±0.03[7]
0.0486±0.0016[5]
0.070±0.004[4]
0.24 (assumed)[3]
C[11] · S[3]
13.20[4][5] · 13.30[9] · 13.4[1][3] · 13.46[8] · 13.51±0.22[11] · 13.56[7]

2012 Guo Shou-Jing, provisional designation 1964 TE2, is a carbonaceous

interloper from the inner regions of the asteroid belt, approximately 13 kilometers in diameter. It was discovered on 9 October 1964, by astronomers at the Purple Mountain Observatory in Nanking, China.[12] The asteroid was named after Chinese astronomer Guo Shoujing.[2]

Orbit and classification

Guo Shou-Jing orbits the Sun at a distance of 1.9–2.7 AU once every 3 years and 7 months (1,298 days). Its orbit has an eccentricity of 0.18 and an inclination of 3° with respect to the ecliptic.[1] The body's observation arc begins 11 years prior to its official discovery observation, with a precovery taken at Palomar Observatory in August 1953.[12]

Florian interloper

Guo Shou-Jing is a dark, carbonaceous asteroid but possesses the orbital characteristics of a member of the Flora family, which is one of the largest groups of bright, stony S-type asteroids in the main-belt. It is therefore thought to be an unrelated interloper that does not origin from the Flora family's parent body.

Physical characteristics

Guo Shou-Jing has been characterized as a carbonaceous C-type asteroid by Pan-STARRS photometric survey.[11]

Fragmentary lightcurve

In August 2010, a fragmentary rotational

U=1+).[10]

Diameter and albedo

According to the surveys carried out by the Japanese

albedo between 0.030 and 0.070.[4][5][6][7][8][9]

Based on purely orbital criteria, the Collaborative Asteroid Lightcurve Link (erroneously) assumes an albedo of 0.24 – derived from 8 Flora, the largest member and namesake of the Flora family – and subsequently calculates a smaller diameter of 5.67 kilometers.[3]

Naming

This

M.P.C. 4420).[13]

References

  1. ^ a b c d "JPL Small-Body Database Browser: 2012 Guo Shou-Jing (1964 TE2)" (2017-06-03 last obs.). Jet Propulsion Laboratory. Retrieved 28 June 2017.
  2. ^
    ISBN 978-3-540-00238-3
    .
  3. ^ a b c d e f "LCDB Data for (2012) Guo Shou-Jing". Asteroid Lightcurve Database (LCDB). Retrieved 28 June 2017.
  4. ^
    doi:10.1093/pasj/63.5.1117. (online, AcuA catalog p. 153
    )
  5. ^
    S2CID 35447010
    .
  6. ^
    doi:10.1088/0004-637X/741/2/68
    . Retrieved 28 June 2017.
  7. ^
    doi:10.3847/0004-6256/152/3/63
    .
  8. ^
    S2CID 46350317
    . Retrieved 28 June 2017.
  9. ^
    S2CID 9341381
    . Retrieved 28 June 2017.
  10. ^ a b Behrend, Raoul. "Asteroids and comets rotation curves – (2012) Guo Shou-Jing". Geneva Observatory. Retrieved 28 June 2017.
  11. ^
    S2CID 53493339
    . Retrieved 28 June 2017.
  12. ^ a b "2012 Guo Shou-Jing (1964 TE2)". Minor Planet Center. Retrieved 28 June 2017.
  13. ISBN 978-3-642-01964-7
    .

External links
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