 2007 JH43 photographed by the Hubble Space Telescope on 26 April 2026 | |
| Discovery[1] | |
|---|---|
| Discovered by | M. E. Schwamb M. E. Brown D. L. Rabinowitz |
| Discovery site | Palomar Obs. |
| Discovery date | 10 May 2007 |
| Designations | |
| TNO[2][1] Scat-Near (DES)[3] | |
| Orbital characteristics[2] | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 31.34 yr (11,446 days) |
| Earliest precovery date | 7 March 1984 |
| Aphelion | 40.566 AU (6.0686 Tm) |
| Perihelion | 38.612 AU (5.7763 Tm) |
| 39.589 AU (5.9224 Tm) | |
| Eccentricity | 0.0247 |
| 249.10 yr (90,983 days) | |
| 177.14° | |
| 0° 0m 14.4s / day | |
| Inclination | 18.129° |
| 64.584° | |
| 4.7053° | |
| Known satellites | 0 |
| Physical characteristics | |
| Dimensions | 505 km (assumed)[4] 529.08 km (calculated)[5] |
| 0.09 (assumed)[4] 0.10 (assumed)[5] | |
| C[5] | |
| 4.49±0.05 (S)[6] 4.82[2][5] | |
(470308) 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 Megan E. Schwamb, Michael E. Brown and David L. Rabinowitz at Palomar Observatory in California, United States.[1]
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.[2] The first precovery was taken at the Australian Siding Spring Observatory during the Digitized Sky Survey in March 1984, extending the body's observation arc by 23 years prior to its discovery observation.[1] It came to perihelion around 1888.[2]
The Hubble Space Telescope photographed 2007 JH43 on 26 April 2026, during a search for moons around large trans-Neptunian objects.[7]
Orbital classification
The Minor Planet Center lists 2007 JH43 as a trans-Neptunian object or a distant object in the Kuiper belt.[1][8] The Deep Ecliptic Survey currently shows it as a scattered object, based on a 10-million-year integration of the orbit.[3]
References
- "(470308) = 2007 JH43". Minor Planet Center. Retrieved 2026-06-09.
- "JPL Small-Body Database Browser: 470308 (2007 JH43)" (2015-07-09 last obs.). Jet Propulsion Laboratory. Retrieved 16 November 2016.
- Marc W. Buie. "Orbit Fit and Astrometric record for 470308". SwRI (Space Science Department). Retrieved 27 May 2020.
- Wm. Robert Johnston (24 March 2015). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 2015-07-22.
- "MinorPlanet.info: One Asteroid Information". Asteroid Lightcurve Database (LCDB). Search using Number = "470308"
- 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.
- Proudfoot, Benjamin (August 2025). "A Search For The Moons of Mid-Sized TNOs". Mikulski Archive for Space Telescopes. Space Telescope Science Institute: HST Proposal 18010. Cycle 33.
- "MPEC 2010-S44 : DISTANT MINOR PLANETS (2010 OCT. 11.0 TT)". IAU Minor Planet Center. 2010-09-25. Retrieved 2014-04-06.