4760 Jia-xiang

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4760 Jia-xiang
Discovery  [1]
Discovered by Harvard College Obs.
Discovery site Oak Ridge Obs.
Discovery date1 April 1981
Designations
(4760) Jia-xiang
Named after
 Zhang Jiaxiang   [1]
(Chinese astronomer)
1981 GN1 ·1981 GP1
1982 SE5
main-belt   [1] [2]  ·(inner) [3]
background   [4]
Orbital characteristics   [2]
Epoch 23 March 2018 (JD 2458200.5)
Uncertainty parameter 0
Observation arc 62.47 yr (22,817 d)
Aphelion 2.6236 AU
Perihelion 2.0279 AU
2.3258 AU
Eccentricity 0.1281
3.55 yr (1,296 d)
37.063°
0° 16m 40.44s / day
Inclination 9.8513°
177.82°
130.44°
Physical characteristics
4.71  km (calculated) [3]
4.79±1.41 km [5]
5.137±0.036 km [6] [7]
5.16±1.28 km [8]
14.96±0.0006  h [lower-alpha 1] [lower-alpha 2]
14.9601 h [lower-alpha 1] [lower-alpha 2]
0.13±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]
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]

    Contents

    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 ( U=3/3 ). [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 2 3 4 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. 1 2 3 4 Lightcurve plot A and plot B of (4760) Jia-xiang, from Ondrejov data obtained by the NEO Photometric Program and collaborating projects

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    References

    1. 1 2 3 4 5 6 "4760 Jia-xiang (1981 GN1)". Minor Planet Center. Retrieved 3 April 2018.
    2. 1 2 3 4 "JPL Small-Body Database Browser: 4760 Jia-xiang (1981 GN1)" (2017-07-05 last obs.). Jet Propulsion Laboratory . Retrieved 3 April 2018.
    3. 1 2 3 4 5 6 "LCDB Data for (4760) Jia-xiang". Asteroid Lightcurve Database (LCDB). Retrieved 3 April 2018.
    4. 1 2 "Asteroid 4760 Jia-xiang – Proper Elements". AstDyS-2, Asteroids – Dynamic Site. Retrieved 29 October 2019.
    5. 1 2 3 4 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. arXiv: 1509.02522 . Bibcode:2015ApJ...814..117N. doi:10.1088/0004-637X/814/2/117. S2CID   9341381.
    6. 1 2 3 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. arXiv: 1109.4096 . Bibcode:2011ApJ...741...68M. doi:10.1088/0004-637X/741/2/68. S2CID   118745497.
    7. 1 2 3 4 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. arXiv: 1109.6407 . Bibcode:2011ApJ...741...90M. doi:10.1088/0004-637X/741/2/90. S2CID   35447010.
    8. 1 2 3 4 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. arXiv: 1606.08923 . Bibcode:2016AJ....152...63N. doi: 10.3847/0004-6256/152/3/63 .
    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. arXiv: 1506.00762 . Bibcode:2015Icar..261...34V. doi:10.1016/j.icarus.2015.08.007. S2CID   53493339.
    10. ↑ "MPC/MPO/MPS Archive". Minor Planet Center. Retrieved 3 April 2018.
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