(613490) 2006 RJ103
| Discovery[1][2] | |
|---|---|
| Discovered by | Sloan Digital Sky Srvy. |
| Discovery site | Apache Point Obs. |
| Discovery date | 12 September 2006 |
| Designations | |
| 2006 RJ103 | |
| Orbital characteristics[1] | |
| Epoch 4 September 2017 (JD 2458000.5) | |
| Uncertainty parameter 3 | |
| Observation arc | 14.15 yr (5,169 days) |
| Aphelion | 30.862 AU |
| Perihelion | 28.988 AU |
| 29.925 AU | |
| Eccentricity | 0.0313 |
| 163.70 yr (59,793 days) | |
| 251.55° | |
| 0° 0m 21.6s / day | |
| Inclination | 8.1641° |
| 120.86° | |
| 33.563° | |
| Physical characteristics | |
| Dimensions | |
| 22.0[5] | |
| 7.5[1] | |
(613490) 2006 RJ103 is a Neptune trojan, first observed by the Sloan Digital Sky Survey Collaboration at Apache Point Observatory, New Mexico, on 12 September 2006.[2] It was the fifth and largest such body discovered, approximately 180 kilometers in diameter. As of 2016[update], it is 30.3 AU from Neptune.
Orbit and classification
[edit]Neptune trojans are resonant trans-Neptunian objects in a 1:1 mean-motion orbital resonance with Neptune. These trojans have a semi-major axis and an orbital period very similar to Neptune's (30.10 AU; 164.8 years).
2006 RJ103 belongs to the leading L4 group, which follow 60° ahead Neptune's orbit. It orbits the Sun with a semi-major axis 29.925 AU of at a distance of 29.0–30.9 AU once every 163 years and 8 months (59,793 days). Its orbit has an eccentricity of 0.03 and an inclination of 8° with respect to the ecliptic.[1]
Physical characteristics
[edit]The discoverers estimate that 2006 RJ103 has a mean-diameter of 180 kilometers based on a magnitude of 22.0.[5] Based on a generic magnitude-to-diameter conversion, it measures approximately 130 kilometers in diameter using an absolute magnitude of 7.5 with an assumed albedo of 0.10.[4]
Ground-based and James Webb Space Telescope spectroscopy have shown that 2006 RJ103 lacks clear signatures of water ice. Instead, its surface is covered by hydrated minerals that have 0.7 and 3.0 micron absorption features.[6][7][8]
Numbering and naming
[edit]This minor planet was numbered by the Minor Planet Center on 28 March 2022 (M.P.C. 139905).[9] If named, it will follow the naming scheme already established with 385571 Otrera, which is to name these objects after figures related to the Amazons, an all-female warrior tribe that fought in the Trojan War on the side of the Trojans against the Greek.[10]
References
[edit]- ^ a b c d e "JPL Small-Body Database Browser: (2006 RJ103)" (2016-02-04 last obs.). Jet Propulsion Laboratory. Retrieved 5 August 2017.
- ^ a b c "2006 RJ103". Minor Planet Center. Retrieved 5 August 2017.
- ^ "List of Neptune Trojans". Minor Planet Center. 10 July 2017. Retrieved 4 August 2017.
- ^ a b "Asteroid Size Estimator". CNEOS/JPL. Retrieved 4 August 2017.
- ^ a b c Lakdawalla, Emily (13 August 2010). "2008 LC15, the first Trojan asteroid discovered in Neptune's L5 point". The Planetary Society. Retrieved 4 August 2017.
- ^ Sharkey, Benjamin N. L.; Reddy, Vishnu; Kuhn, Olga; Sanchez, Juan A.; Bottke, William F. (1 November 2023). "Spectroscopic Links among Giant Planet Irregular Satellites and Trojans". The Planetary Science Journal. 4 (11): 223. arXiv:2310.19934. Bibcode:2023PSJ.....4..223S. doi:10.3847/PSJ/ad0845. ISSN 2632-3338.
- ^ Belyakov, Matthew; Brown, Michael E. (1 April 2025). "Saturnian Irregular Satellites as a Probe of Kuiper Belt Surface Evolution". The Planetary Science Journal. 6 (4): 97. arXiv:2503.20046. Bibcode:2025PSJ.....6...97B. doi:10.3847/PSJ/adc55d. ISSN 2632-3338.
- ^ Markwardt, Larissa; Holler, Bryan J.; Hsing Wen Lin; Gerdes, David W.; Adams, Fred C.; Malhotra, Renu; Napier, Kevin J. (2023). "First Near-IR Spectroscopic Survey of Neptune Trojans with JWST: Distinct Surface Compositions of Red vs Ultra-Red Neptune Trojans". arXiv:2310.03998 [astro-ph.EP].
- ^ "MPC/MPO/MPS Archive". Minor Planet Center.
- ^ Ticha, J.; et al. (10 April 2018). "DIVISION F / Working Group for Small Body Nomenclature Working Group for Small Body Nomenclature. THE TRIENNIAL REPORT (2015 Sept 1 – 2018 Feb 15)" (PDF). IAU. Retrieved 25 August 2018.
External links
[edit]- AstDys-2 about 2006 RJ103
- (613490) 2006 RJ103 at AstDyS-2, Asteroids—Dynamic Site
- (613490) 2006 RJ103 at the JPL Small-Body Database
