(589683) 2010 RF43
| Discovery [1][2] | |
|---|---|
| Discovered by | D. L. Rabinowitz M. Schwamb S. Tourtellotte |
| Discovery site | La Silla Obs. |
| Discovery date | 6 September 2010 (first observed only) |
| Designations | |
| 2010 RF43 | |
| TNO [3][4] · SDO [5] p-DP [6] · distant [1] | |
| Orbital characteristics [3] | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 44.00 yr (16,071 days) |
| Aphelion | 61.903 AU |
| Perihelion | 37.482 AU |
| 49.692 AU | |
| Eccentricity | 0.2457 |
| 350.30 yr (127,948 d) | |
| 97.520° | |
| 0° 0m 10.08s / day | |
| Inclination | 30.638° |
| 25.320° | |
| 193.480° | |
| Physical characteristics | |
| 636 km (estimate)[7] 643 km (estimate)[6] ≈735 km (estimate)[4] | |
| 0.09 (assumed)[4] 0.10 (assumed)[7] 0.11 (assumed)[6] | |
| 3.9[3] · 4.0[6] · 4.1[7] | |
2010 RF43 is a trans-Neptunian object of the scattered disc orbiting in the outermost regions of the Solar System. It measures approximately 650 kilometers (400 mi) in diameter and is a strong dwarf-planet candidate. The object was first observed 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.
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 735 kilometers (457 mi),[4] while astronomer Michael Brown assumes an albedo of 0.11 and calculates a diameter of 643 kilometers (400 mi) using a fainter magnitude of 4.0. Brown also characterizes the object as a "highly likely dwarf planet", the second-highest level in his classification scheme (also see list of candidates).[6]
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.[7]
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][7]
Numbering and naming
As of 2020, this minor planet has not been numbered or named.[1]
References
- ^ a b c d e "2010 RF43". Minor Planet Center. Retrieved 27 August 2020.
- ^ a b "List Of Centaurs and Scattered-Disk Objects". Minor Planet Center. Retrieved 22 August 2020.
- ^ a b c d e f "JPL Small-Body Database Browser: (2010 RF43)" (2020-08-19 last obs.). Jet Propulsion Laboratory. Retrieved 28 August 2020.
- ^ a b c d Johnston, Wm. Robert (18 August 2020). "List of Known Trans-Neptunian Objects". Johnston's Archive. Retrieved 28 August 2020.
- ^ Buie, Marc W. "Orbit Fit and Astrometric record for 10RF43". SwRI (Space Science Department). Retrieved 23 February 2018.
- ^ a b c d e Brown, Michael E. "How many dwarf planets are there in the outer solar system?". California Institute of Technology. Retrieved 23 February 2018.
- ^ a b c d e "LCDB Data for (2010+RF43)". Asteroid Lightcurve Database (LCDB). Retrieved 22 August 2020.
- ^ "List Of Transneptunian Objects". Minor Planet Center. Retrieved 22 August 2020.
External links
- MPEC 2011-U09 : 2010 RF43, Minor Planet Electronic Circular, 17 October 2011
- (589683) 2010 RF43 at AstDyS-2, Asteroids—Dynamic Site
- (589683) 2010 RF43 at the JPL Small-Body Database
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