(470308) 2007 JH43

(470308) 2007 JH43, provisional designation 2007 JH43, is a trans-Neptunian object in the outer regions of the Solar System, approximately 500 kilometers in diameter. It was discovered on 10 May 2007, by the U.S. Palomar Observatory in California. The team of unaccredited astronomers at Palomar consisted of Megan E. Schwamb, Michael E. Brown and David L. Rabinowitz[2]

(470308) 2007 JH43
Discovery [1]
Discovered byPalomar Obs.
Unaccredited:
M. E. Schwamb
M. E. Brown
D. L. Rabinowitz
Discovery sitePalomar Obs.
Discovery date10 May 2007
Designations
2007 JH43
TNO[1][2]
Scat-Near (DES)[3]
Orbital characteristics [1]
Epoch 31 July 2016 (JD 2457600.5)
Uncertainty parameter 3
Observation arc31.34 yr (11,446 days)
Earliest precovery date7 March 1984
Aphelion40.566 AU (6.0686 Tm)
Perihelion38.612 AU (5.7763 Tm)
39.589 AU (5.9224 Tm)
Eccentricity0.0247
249.10 yr (90,983 days)
177.14°
0° 0m 14.4s / day
Inclination18.129°
64.584°
4.7053°
Physical characteristics
Dimensions505 km (assumed)[4]
529.08 km (calculated)[5]
0.09 (assumed)[4]
0.10 (assumed)[5]
C [5]
4.49±0.05 (S)[6]
4.5[1][5]

    The minor planet orbits the Sun at a distance of 38.6–40.6 AU once every 249 years and 1 month (90,983 days). Its orbit has an eccentricity of 0.02 and an inclination of 18° with respect to the ecliptic.[1] The first precovery was taken at the Australian Siding Spring Observatory during the Digitized Sky Survey in 1984, extending the body's observation arc by 23 years prior to its discovery observation.[2] It came to perihelion around 1888.[1] Based on an absolute magnitude of 4.5 and assuming a generic albedo for trans-Neptunian objects of 0.09, it is about 500 kilometres (310 mi) in diameter, which makes it likely a dwarf planet.[7][4]

    Orbital classification

    The Minor Planet Center lists 2007 JH43 as a trans-Neptunian object or a distant object in the Kuiper belt.[2][8] The Deep Ecliptic Survey currently shows it as a scattered object, based on a 10-million-year integration of the orbit.[3]

    Rotating frame animation of 2007 JH43's orbit (red) compared to Pluto (grey), with Neptune kept stationary

    References
    1. "JPL Small-Body Database Browser: 470308 (2007 JH43)" (2015-07-09 last obs.). Jet Propulsion Laboratory. Retrieved 16 November 2016.
    2. "470308 (2007 JH43)". Minor Planet Center. Retrieved 16 November 2016.
    3. Marc W. Buie. "Orbit Fit and Astrometric record for 470308". SwRI (Space Science Department). Retrieved 27 May 2020.
    4. Wm. Robert Johnston (24 March 2015). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 2015-07-22.
    5. "LCDB Data for (470308)". Asteroid Lightcurve Database (LCDB). Retrieved 16 November 2016.
    6. Benecchi, Susan D.; Sheppard, Scott S. (May 2013). "Light Curves of 32 Large Transneptunian Objects". The Astronomical Journal. 145 (5): 19. arXiv:1301.5791. Bibcode:2013AJ....145..124B. doi:10.1088/0004-6256/145/5/124. S2CID 54183985. Retrieved 16 November 2016.
    7. "How many dwarf planets are there in the outer solar system?". Gps.caltech.edu. 2015-07-21. Retrieved 2015-07-22.
    8. "MPEC 2010-S44 : DISTANT MINOR PLANETS (2010 OCT. 11.0 TT)". IAU Minor Planet Center. 2010-09-25. Retrieved 2014-04-06.
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