(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 by	Palomar Obs. Unaccredited: M. E. Schwamb M. E. Brown D. L. Rabinowitz
Discovery site	Palomar Obs.
Discovery date	10 May 2007
Designations
MPC designation	2007 JH43
Minor planet category	TNO[1][2] Scat-Near (DES)[3]
Orbital characteristics[1]
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)
Semi-major axis	39.589 AU (5.9224 Tm)
Eccentricity	0.0247
Orbital period (sidereal)	249.10 yr (90,983 days)
Mean anomaly	177.14°
Mean motion	0° 0m 14.4s / day
Inclination	18.129°
Longitude of ascending node	64.584°
Argument of perihelion	4.7053°
Physical characteristics
Dimensions	505 km (assumed)[4] 529.08 km (calculated)[5]
Geometric albedo	0.09 (assumed)[4] 0.10 (assumed)[5]
Spectral type	C[5]
Absolute magnitude (H)	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 March 1984, extending the body's observation arc by 23 years prior to its discovery observation.^[2] It came to perihelion around 1888.^[1]

Orbital classification

The Minor Planet Center lists 2007 JH₄₃ as a trans-Neptunian object or a distant object in the Kuiper belt.^[2][7] 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