Astronomy:4760 Jia-xiang

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4760 Jia-xiang
Discovery [1]
Discovered byHarvard College Obs.
Discovery siteOak Ridge Obs.
Discovery date1 April 1981
Designations
(4760) Jia-xiang
Named afterZhang Jiaxiang [1]
(Chinese astronomer)
1981 GN1 · 1981 GP1
1982 SE5
Minor planet categorymain-belt [1][2] · (inner)[3]
background [4]
Orbital characteristics [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc62.47 yr (22,817 d)
|{{{apsis}}}|helion}}2.6236 AU
|{{{apsis}}}|helion}}2.0279 AU
2.3258 AU
Eccentricity0.1281
Orbital period3.55 yr (1,296 d)
Mean anomaly37.063°
Mean motion0° 16m 40.44s / day
Inclination9.8513°
Longitude of ascending node177.82°
130.44°
Physical characteristics
Mean diameter4.71 km (calculated)[3]
4.79±1.41 km[5]
5.137±0.036 km[6][7]
5.16±1.28 km[8]
Rotation period14.96±0.0006 h[lower-alpha 1][lower-alpha 2]
14.9601 h[lower-alpha 1][lower-alpha 2]
Geometric albedo0.13±0.06[8]
0.20 (assumed)[3]
0.21±0.15[5]
0.227±0.042[6]
0.2275±0.0418[7]
S (assumed)[3]
Absolute magnitude (H)13.56±0.40[9] · 13.7[7] · 13.90[5] · 14.0[2][3] · 14.29[8]


4760 Jia-xiang, provisional designation 1981 GN1, is a background asteroid from the inner regions of the asteroid belt, approximately 5 kilometers (3 miles) in diameter. It was discovered on 1 April 1981, by astronomers at Harvard University's Oak Ridge Observatory in Massachusetts, United States.[1] The presumed stony S-type asteroid was named after Chinese astronomer Zhang Jiaxiang. It has a rotation period of 14.96 hours.[lower-alpha 1][lower-alpha 2]

Orbit and classification

Jia-xiang is a non-family asteroid from the main belt's background population.[4] It orbits the Sun in the inner main-belt at a distance of 2.0–2.6 AU once every 3 years and 7 months (1,296 days; semi-major axis of 2.33 AU). Its orbit has an eccentricity of 0.13 and an inclination of 10° with respect to the ecliptic.[2] The body's observation arc begins with a precovery taken at Palomar Observatory in January 1955, or 26 years prior to its official discovery observation at Oak Ridge.[1]

Physical characteristics

Rotation period

In 2017, two rotational lightcurves of Jia-xiang were obtained from photometric observations by Czech astronomer Petr Pravec at Ondřejov Observatory. Lightcurve analysis gave a rotation period of 14.96 and 14.9601 hours with a brightness amplitude of 0.55 and 0.63 magnitude, respectively ({{{1}}}).[lower-alpha 1][lower-alpha 2]

Diameter and albedo

According to the survey carried out by the NEOWISE mission of NASA's Wide-field Infrared Survey Explorer, Jia-xiang measures between 4.79 and 5.16 kilometers in diameter and its surface has an albedo between 0.13 and 0.2275.[5][6][7][8]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.20 and calculates a diameter of 4.71 kilometers based on an absolute magnitude of 14.0.[3]

Naming

This minor planet was named after Chinese astronomer Zhang Jiaxiang (born 1932).[1] The official naming citation was published by the Minor Planet Center on 21 November 1991 (M.P.C. 19339).[10]

Notes

  1. ↑ 1.0 1.1 1.2 1.3 Pravec (2017) web: rotation period 14.96±0.02 and 14.9601±0.0006 hours with a brightness amplitude of 0.55±0.02 and 0.63±0.02 mag. Quality Code is 3/3. Summary figures at the LCDB and Pravec, P.; Wolf, M.; Sarounova, L. (2017)
  2. ↑ 2.0 2.1 2.2 2.3 Lightcurve plot A and plot B of (4760) Jia-xiang, from Ondrejov data obtained by the NEO Photometric Program and collaborating projects

References

  1. ↑ 1.0 1.1 1.2 1.3 1.4 1.5 "4760 Jia-xiang (1981 GN1)". Minor Planet Center. https://www.minorplanetcenter.net/db_search/show_object?object_id=4760. 
  2. ↑ 2.0 2.1 2.2 2.3 "JPL Small-Body Database Browser: 4760 Jia-xiang (1981 GN1)". Jet Propulsion Laboratory. https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2004760. 
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 "LCDB Data for (4760) Jia-xiang". Asteroid Lightcurve Database (LCDB). http://www.minorplanet.info/PHP/generateOneAsteroidInfo.php?AstInfo=4760%7CJia-xiang. 
  4. ↑ 4.0 4.1 "Asteroid 4760 Jia-xiang – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. https://newton.spacedys.com/astdys/index.php?pc=1.1.6&n=4760. 
  5. ↑ 5.0 5.1 5.2 5.3 Nugent, C. R.; Mainzer, A.; Masiero, J.; Bauer, J.; Cutri, R. M.; Grav, T. et al. (December 2015). "NEOWISE Reactivation Mission Year One: Preliminary Asteroid Diameters and Albedos". The Astrophysical Journal 814 (2): 13. doi:10.1088/0004-637X/814/2/117. Bibcode: 2015ApJ...814..117N. 
  6. ↑ 6.0 6.1 6.2 Masiero, Joseph R.; Mainzer, A. K.; Grav, T.; Bauer, J. M.; Cutri, R. M.; Dailey, J. et al. (November 2011). "Main Belt Asteroids with WISE/NEOWISE. I. Preliminary Albedos and Diameters". The Astrophysical Journal 741 (2): 20. doi:10.1088/0004-637X/741/2/68. Bibcode: 2011ApJ...741...68M. 
  7. ↑ 7.0 7.1 7.2 7.3 Mainzer, A.; Grav, T.; Masiero, J.; Hand, E.; Bauer, J.; Tholen, D. et al. (November 2011). "NEOWISE Studies of Spectrophotometrically Classified Asteroids: Preliminary Results". The Astrophysical Journal 741 (2): 25. doi:10.1088/0004-637X/741/2/90. Bibcode: 2011ApJ...741...90M. 
  8. ↑ 8.0 8.1 8.2 8.3 Nugent, C. R.; Mainzer, A.; Bauer, J.; Cutri, R. M.; Kramer, E. A.; Grav, T. et al. (September 2016). "NEOWISE Reactivation Mission Year Two: Asteroid Diameters and Albedos". The Astronomical Journal 152 (3): 12. doi:10.3847/0004-6256/152/3/63. Bibcode: 2016AJ....152...63N. 
  9. ↑ Veres, Peter; Jedicke, Robert; Fitzsimmons, Alan; Denneau, Larry; Granvik, Mikael; Bolin, Bryce et al. (November 2015). "Absolute magnitudes and slope parameters for 250,000 asteroids observed by Pan-STARRS PS1 - Preliminary results". Icarus 261: 34–47. doi:10.1016/j.icarus.2015.08.007. Bibcode: 2015Icar..261...34V. 
  10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. https://www.minorplanetcenter.net/iau/ECS/MPCArchive/MPCArchive_TBL.html. 

External links



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