PROFILPELAJAR.COM

(589683) 2010 RF₄₃
Discovery
Discovered by	D. L. Rabinowitz; M. Schwamb; S. Tourtellotte
Discovery site	La Silla Obs.
Discovery date	6 September 2010
Designations
MPC designation	(589683) 2010 RF43
Alternative designations	2010 RF43
Minor planet category	TNO · SDO · distant
Orbital characteristics
	Epoch 31 May 2020 (JD 2459000.5)
	Uncertainty parameter 2
Observation arc	46.17 yr (~16,860 days)
Earliest precovery date	19 August 1976
Aphelion	61.903 AU
Perihelion	37.482 AU
Semi-major axis	49.692 AU
Eccentricity	0.2457
Orbital period (sidereal)	350.30 yr (127,948 d)
Mean anomaly	97.520°
Mean motion	0° 0m 10.08s / day
Inclination	30.638°
Longitude of ascending node	25.320°
Argument of perihelion	193.480°
Physical characteristics
Mean diameter	636 km (estimate); 643 km (estimate); ≈770 km (estimate)
Geometric albedo	0.09 (assumed); 0.10 (assumed); 0.11 (assumed)
Absolute magnitude (H)	3.9 · 4.0 · 4.1

(589683) 2010 RF₄₃ (provisional designation 2010 RF₄₃) is a large trans-Neptunian object orbiting in the scattered disc in the outermost regions of the Solar System. The object was discovered on 9 September 2010, by American astronomers David Rabinowitz, Megan Schwamb and Suzanne Tourtellotte at ESO's La Silla Observatory in northern Chile.^[1]

Orbit and classification

2010 RF₄₃ orbits the Sun at a distance of 37.5–61.9 AU once every 350 years and 4 months (127,948 days; semi-major axis of 49.7 AU). Its orbit has an eccentricity of 0.25 and an inclination of 31° with respect to the ecliptic.^[3] The body's observation arc begins with a precovery observation taken at Siding Spring Observatory in August 1976.^[1]

Due to its relatively high eccentricity and inclination, it is an object of the scattered disc rather than one of the regular Kuiper belt.^[2]^[8] Its perihelion of 37.5 AU is also too low to make it a detached object, which typically stay above 40 AU and never come close to the orbit of Neptune.

Numbering and naming

This minor planet was numbered by the Minor Planet Center on 20 September 2021, receiving the number (589683) in the minor planet catalog (M.P.C. 135075).^[9] As of 2021^[update], it has not been named.^[1]

Physical characteristics

Diameter and albedo

Based on an absolute magnitude of 3.9,^[3] and an assumed albedo of 0.09, the Johnston's archive estimates a mean diameter of approximately 770 kilometers (480 mi).^[4]

The Collaborative Asteroid Lightcurve Link assumes an albedo of 0.10 and calculates a diameter of 636 kilometers (395 mi) based on an absolute magnitude of 4.1.^[6]

Rotation period

As of 2020, no rotational lightcurve of this object has been obtained from photometric observations. The object's rotation period, pole and shape remain unknown.^[3]^[6]