| Background: |
|
| Discoverer: | Pan-STARRS (F51) |
| Discovery Site: | F51, Haleakala Observatory |
| Discovered: | 28 July 2014 |
| Mp Category: | Classical Kuiper belt object[1] |
| Orbit Ref: | [2] |
| Epoch: | 31 July 2016 (JD 2457600.5) |
| Uncertainty: | 2 |
| Observation Arc: | 1452 days (5 oppositions) |
| Aphelion: | 51.976 AU |
| Semimajor: | 46.391 AU |
| Perihelion: | 40.805 ± 0.002 AU |
| Eccentricity: | 0.12040 ± 0.00005 |
| Period: | 316 years |
| Inclination: | 3.93206 ± 0.00008° |
| Asc Node: | 308.87986 ± 0.0004° |
| Mean Anomaly: | 70.25469° |
| Arg Peri: | 259.35897 ± 0.008° |
| Mean Diameter: | 280-540 km 240-730 km[3] |
| Abs Magnitude: | 4.74[4] |
(provisional designation ) is a large cubewano in the Kuiper belt that was discovered in July 2014 by the Pan-STARRS-1 telescope, and announced on 17 July 2016.[5] It is one of the brighter trans-Neptunian objects, being the 34th brightest cubewano as of 23 July 2016. Its exact size is unknown, but is most likely between 240 and 730 kilometers across.[3] Mike Brown's website lists it as a "possible" dwarf planet, with an estimated diameter of 337 kilometers.[6]
was observed by the New Horizons probe in September 2017 and August 2018. It passed close by:[7] about 8.7 AU away on 1 January 2017, and 7.5 AU on 1 January 2019.