Astronomy:2015 RY245

2015 RY₂₄₅

Discovery
Discovered by	OSSOS
Discovery site	Mauna Kea Obs.
Discovery date	9 September 2015
Designations
MPC designation	2015 RY245
Alternative designations	o5s13
Minor planet category	TNO · SDO
Orbital characteristics
Epoch 4 September 2017 (JD 2458000.5)
Uncertainty parameter 5
Observation arc	1.47 yr (538 days)
|{{{apsis}}}|helion}}	411.25 AU
|{{{apsis}}}|helion}}	31.276 AU
Semi-major axis	221.26 AU
Eccentricity	0.8586
Orbital period	3291.32 yr (1,202,155 days)
Mean anomaly	1.6973°
Mean motion	0° 0m 1.08s / day
Inclination	6.0347°
Longitude of ascending node	341.55°
|{{{apsis}}}|helion}}	354.30°
Physical characteristics
Dimensions	78 km
Apparent magnitude	24.6
Absolute magnitude (H)	9.0683

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.

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. Such objects can not reach such orbits without some perturbing object, which lead to the speculation of planet nine.

External links

• OSSOS survey by the Canada–France–Hawaii Telescope
• OSSOS VI. Striking Biases in the detection of large semimajor axis Trans-Neptunian Objects 16 Jun 2017
• 2015 RY245 at the Minor Planet Center
• 2015 RY245 at the JPL Small-Body Database
  • Close approach · Discovery · Ephemeris · Orbit diagram · Orbital elements · Physical parameters