(574372) 2010 JO₁₇₉

(574372) 2010 JO₁₇₉
Discovery
Discovered by	Pan-STARRS 1
Discovery site	Haleakala Obs.
Discovery date	10 May 2010
Designations
MPC designation	(574372) 2010 JO179
Alternative designations	2010 JO179
Minor planet category	TNO · SDO · 5:21 res.; p-DP · distant
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 2
Observation arc	69.54 yr (25,399 days)
Earliest precovery date	4 February 1951 (POSS-I)
Aphelion	117.997 AU
Perihelion	39.590 AU
Semi-major axis	78.793 AU
Eccentricity	0.49755
Orbital period (sidereal)	699.43 yr (255,466 d)
Mean anomaly	35.211°
Mean motion	0° 0m 5.04s / day
Inclination	32.025°
Longitude of ascending node	147.350°
Time of perihelion	1951-Sep-13
Argument of perihelion	10.427°
Known satellites	0
Physical characteristics
Mean diameter	600–900 km (implied by estimated albedo); 647 km?
Synodic rotation period	30.6 h; 30.6324 h (best fit)
Geometric albedo	0.07 ~ 0.21 (estimated); 0.124 (assumed)
Spectral type	g-r = 0.88±0.21; r-i = 0.34±0.26; r-z = 0.13±0.22
Absolute magnitude (H)	3.44±0.10 (R-band); 3.83

(574372) 2010 JO₁₇₉ (provisional designation 2010 JO₁₇₉) is a large, high-order resonant trans-Neptunian object in the outermost regions of the Solar System, probably somewhere between 600 and 900 kilometers (370 and 560 miles) in diameter. Long-term observations suggest that the object is in a meta-stable 5:21 resonance with Neptune. Other sources classify it as a scattered disc object. It is possibly large enough to be a dwarf planet.

2010 JO₁₇₉ has not yet been imaged by high-resolution telescopes, so it has no known moons. The Hubble Space Telescope is planned to image 2010 JO₁₇₉ in 2026, which should determine if it has significantly sized moons.