2015 RY245

2015 RY245, also known as o5s13, is a trans-Neptunian object from the scattered disc of the outermost reaches of the Solar System, approximately 78 kilometers in diameter. It was discovered on 9 September 2015, by the Outer Solar System Origins Survey using the Canada–France–Hawaii Telescope at Mauna Kea Observatories, Hawaii, United States.[2]

2015 RY245
Discovery[1][2]
Discovered byOSSOS
Discovery siteMauna Kea Obs.
Discovery date9 September 2015
Designations
2015 RY245
o5s13[3]
TNO[1] · SDO[4]
Orbital characteristics[1]
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 5
Observation arc1.47 yr (538 days)
Aphelion411.25 AU
Perihelion31.276 AU
221.26 AU
Eccentricity0.8586
3291.32 yr (1,202,155 days)
1.6973°
0° 0m 1.08s / day
Inclination6.0347°
341.55°
354.30°
Physical characteristics
Dimensions78 km[4]
24.6
9.0683[1]

    It is one a small number of detached objects with perihelion distances of 30 AUs or more, and semi-major axes of 200 AU or more.[5] Such objects can not reach such orbits without some perturbing object, which lead to the speculation of planet nine.

    References
    1. "JPL Small-Body Database Browser: (2015 RY245)" (2017-01-02 last obs.). Jet Propulsion Laboratory. Retrieved 2 August 2017.
    2. "2015 RY245". Minor Planet Center. Retrieved 2 August 2017.
    3. Shankman, Cory; et al. (2017). "OSSOS. VI. Striking Biases in the Detection of Large Semimajor Axis Trans-Neptunian Objects". The Astronomical Journal. 154 (2): 50. arXiv:1706.05348. Bibcode:2017AJ....154...50S. doi:10.3847/1538-3881/aa7aed. hdl:10150/625487. S2CID 3535702.
    4. "List of Known Trans-Neptunian Objects". Johnston's Archive. 22 July 2017. Retrieved 2 August 2017.
    5. minorplanetcenter.net: q>30, a>200


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