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Minor planet co-orbital with Uranus From Wikipedia, the free encyclopedia
(636872) 2014 YX49 (provisional designation 2014 YX49) is a centaur and Uranus co-orbital, approximately 77 kilometers (48 miles) in diameter, first observed on December 26, 2014, by the Pan-STARRS survey.[4] It is the second known centaur on a tadpole orbit with Uranus, and the fourth Uranus co-orbital discovered after 83982 Crantor, 2011 QF99 and (472651) 2015 DB216.[5]
Animation of 2014 YX49 relative to Sun and Uranus 1600-2500 2014 YX49 · Uranus · Sun | |
| Discovery[1] | |
|---|---|
| Discovered by | Pan-STARRS |
| Discovery site | Haleakala Obs. |
| Discovery date | December 26, 2014 |
| Designations | |
| 2014 YX49 | |
| Uranus trojan centaur[2][3] · distant[1] | |
| Orbital characteristics[2] | |
| Epoch 16 February 2017 (JD 2457800.5) | |
| Uncertainty parameter 1 | |
| Observation arc | 4876 days (13.35 yr) |
| Aphelion | 24.4207 AU (3.65328 Tm) |
| Perihelion | 13.8401 AU (2.07045 Tm) |
| 19.1304 AU (2.86187 Tm) | |
| Eccentricity | 0.276539 |
| 83.67 yr (30562 d) | |
| 75.587° | |
| Inclination | 25.55097° |
| 91.44425° | |
| 280.584° | |
| Earth MOID | 12.9424 AU (1.93616 Tm) |
| Jupiter MOID | 9.47006 AU (1.416701 Tm) |
| Physical characteristics | |
| 77 km (est. at 0.09)[3] | |
| 21.6 | |
| 8.8 | |
Centaur 2014 YX49 is a temporary L4 trojan of Uranus, the second one (2011 QF99 was identified first) to be confirmed as currently trapped in such a resonant state. This object may have remained as a L4 Uranian Trojan for about 60,000 years and it can continue that way for another 80,000 years. Numerical integrations suggest that it may stay within Uranus' co-orbital zone for nearly one million years.[5]
Besides being a L4 Uranian trojan, 2014 YX49 is trapped in the 7:20 mean motion resonance with Saturn as well; therefore, this minor body is currently subjected to a three-body resonance.[5] The other known Uranian trojan, 2011 QF99, is also in this resonant configuration.
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