2014 YX49

2014 YX49 is a centaur and Uranus co-orbital first observed on December 26, 2014, by the Pan-STARRS survey.[3] 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.[4]

2014 YX49
Discovery[1]
Discovered byPan-STARRS
Discovery dateDecember 26, 2014
Designations
2014 YX49
Centaur
Uranus Co-orbital
Orbital characteristics[2]
Epoch 16 February 2017 (JD 2457800.5)
Uncertainty parameter 1
Observation arc4876 days (13.35 yr)
Aphelion24.4207 AU (3.65328 Tm)
Perihelion13.8401 AU (2.07045 Tm)
19.1304 AU (2.86187 Tm)
Eccentricity0.276539
83.67 yr (30562 d)
75.587°
Inclination25.55097°
91.44425°
280.584°
Earth MOID12.9424 AU (1.93616 Tm)
Jupiter MOID9.47006 AU (1.416701 Tm)
Physical characteristics
Dimensions40–120 km
21.6
8.8

    Asteroid 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 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.[4]

    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.[4] The other known Uranian trojan, 2011 QF99, is also in this resonant configuration.

    See also

    Notes
    1. ^ Assuming an albedo from 0.05 (120 km) to 0.5 (40 km).

    References
    1. "2014 YX49 - Minor Planet Center". Minor Planet Center. International Astronomical Union. Retrieved 20 January 2017.
    2. "JPL Small Body Database Browser". JPL (2015-01-28 last obs.). NASA. Retrieved 20 January 2017.
    3. "MPEC 2016-O10 : 2014 YX49". Minor Planet Center. International Astronomical Union. Retrieved 20 January 2017.
    4. de la Fuente Marcos, Carlos; de la Fuente Marcos, Raúl (15 May 2017). "Asteroid 2014 YX49: a large transient Trojan of Uranus". Monthly Notices of the Royal Astronomical Society. 467 (2): 1561–1568. arXiv:1701.05541. Bibcode:2017MNRAS.467.1561D. doi:10.1093/mnras/stx197.

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