(470308) 2007 JH43

Trans-Neptunian object (278361) 2007 JJ43 (278361) 2007 JJ 43, a Scattered-Near object yes #C2E0FF (470308) 2007 JH 43 File:2007 JH43 Hubble.png 2007 JH 43 photographed by the Hubble Space Telescope on 26 April 2026 M. E. SchwambM. E. BrownD. L. Rabinowitz 10 May 2007 Palomar Obs. 7 March 1984 (470308) 2007 JH 43 TNOScat-Near (DES) 31 July 2016 (JD 2457600.5) 3 31.34 yr (11,446 days) 40.566 AU Tm on 38.612 AU Tm on 39.589 AU Tm on 0.0247 249.10 yr (90,983 days) 177.14° 0.0040 ms / day 18.129° 64.584° 4.7053° 0 531 km (assumed)604.77 km (assumed) 530 km (assumed) 0.079 (assumed)0.057 (assumed) 0.08 (assumed) C 4.49 0.05 (S)4.82 (470308) 2007 JH 43 is a trans-Neptunian object in the outer regions of the Solar System, approximately 500 to 600 km mi us 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. 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. 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. It came to perihelion around 1888. The Hubble Space Telescope photographed 2007 JH 43 on 26 April 2026, during a search for moons around large trans-Neptunian objects. Physical characteristics Diameter and albedo 2007 JH 43 has estimated diameters of 531 km mi us,List of known trans-Neptunian objects https://www.johnstonsarchive.net/astro/tnoslist.html 2026-08-08 www.johnstonsarchive.net 604.77 km mi us,MinorPlanet.info: One Asteroid Info https://www.minorplanet.info/PHP/oneasteroidinfo.php 2026-08-08 www.minorplanet.info and 530 km mi us. assuming an albedo of 0.074, 0.057, 0.08. respectively.studio7designs.com fullahead.org - Astronomer Mike Brown https://web.gps.caltech.edu/~mbrown/dps.html https://web.archive.org/web/20260801201155/https://web.gps.caltech.edu/~mbrown/dps.html 2026-08-01 2026-08-12 web.gps.caltech.edu en Rotation period As of 2026, no rotational lightcurve of this object has been obtained from photometric observations. The object's rotation period, pole and shape remain unknown.Small-Body Database Lookup https://ssd.jpl.nasa.gov/tools/sbdb_lookup.html#/?sstr=470308 2026-08-08 ssd.jpl.nasa.gov In 2013, Benecchi and colleagues put an upper bound of 0.08 mag on its lightcurve amplitude. Surface and spectra 2007 JH 43 has known color indices of: g′-r′ of 0.68 ± 0.04; g′-i′ of 1.09 ± 0.03; and r′-i′ of 0.41 ± 0.03.Benecchi Susan D. Sheppard Scott S. 2013-03-25 LIGHT CURVES OF 32 LARGE TRANSNEPTUNIAN OBJECTS https://iopscience.iop.org/article/10.1088/0004-6256/145/5/124 The Astronomical Journal 145 5 124 10.1088/0004-6256/145/5/124 0004-6256 1301.5791 It is also a C-type asteroid. It has assumed albedos of: 0.074, 0.057, and 0.08. Orbital classification The Minor Planet Center lists 2007 JH 43 as a trans-Neptunian object or a distant object in the Kuiper belt. The Deep Ecliptic Survey currently shows it as a scattered object, based on a 10-million-year integration of the orbit. 300px|thumb|none|Rotating frame animation of 2007 JH 43's orbit (red) compared to Pluto (grey), with Neptune kept stationary thumb|none|2007 JH 43 moving against a field of stars, as seen by the Hubble Space Telescope on 26 April 2026. References 2015-07-09 last obs. JPL Small-Body Database Browser: 470308 (2007 JH43) https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2470308 Jet Propulsion Laboratory 16 November 2016 (470308) = 2007 JH43 https://www.minorplanetcenter.net/db_search/show_object?object_id=470308 Minor Planet Center 2026-06-09 Marc W. Buie Orbit Fit and Astrometric record for 470308 SwRI (Space Science Department) https://www.boulder.swri.edu/~buie/kbo/astrom/470308.html 27 May 2020 MPEC 2010-S44 : DISTANT MINOR PLANETS (2010 OCT. 11.0 TT) IAU Minor Planet Center 2010-09-25 https://minorplanetcenter.net/mpec/K10/K10S44.html 2014-04-06 24 March 2015 List of Known Trans-Neptunian Objects Johnston's Archive Wm. Robert Johnston https://www.johnstonsarchive.net/astro/tnoslist.html 2015-07-22 470308 16 November 2016 Susan D. Benecchi Scott S. Sheppard May 2013 Light Curves of 32 Large Transneptunian Objects http://adsabs.harvard.edu/cgi-bin/bib_query?bibcode=2013AJ....145..124B The Astronomical Journal 145 5 19 2013AJ....145..124B 10.1088/0004-6256/145/5/124 16 November 2016 1301.5791 54183985 A Search For The Moons of Mid-Sized TNOs https://www.stsci.edu/hst-program-info/download/hst/pdf/18010/ Benjamin Proudfoot Mikulski Archive for Space Telescopes Space Telescope Science Institute August 2025 HST Proposal 18010 Cycle 33 External links 2007 JH43 Precovery Images 470308 470308 (470308) 2007 JH 43 Category:Scattered disc and detached objects Category:Discoveries by the Palomar Observatory 20070510