| Discovery | |
|---|---|
| Discovered by | Pan-STARRS (F51) |
| Discovery site | F51, Haleakala Observatory |
| Discovery date | 28 July 2014 |
| Designations | |
| Minor planet category | Classical Kuiper belt object |
| Orbital characteristics | |
| Epoch 31 July 2016 (JD 2457600.5) | |
| Uncertainty parameter 2 | |
| Observation arc | 1452 days (5 oppositions) |
| Aphelion | 51.976 AU |
| Perihelion | 40.805 ± 0.002 AU |
| Semi-major axis | 46.391 AU |
| Eccentricity | 0.12040 ± 0.00005 |
| Orbital period (sidereal) | 316 years |
| Mean anomaly | 70.25469° |
| Inclination | 3.93206 ± 0.00008° |
| Longitude of ascending node | 308.87986 ± 0.0004° |
| Argument of perihelion | 259.35897 ± 0.008° |
| Physical characteristics | |
| Mean diameter | 280-540 km 240-730 km |
| Absolute magnitude (H) | 4.74 |
(556416) 2014 OE394 (provisional designation 2014 OE394) 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. 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. Mike Brown's website lists it as a "possible" dwarf planet, with an estimated diameter of 337 kilometers.
2014 OE394 was observed by the New Horizons probe in September 2017 and August 2018. It passed close by: about 8.7 AU away on 1 January 2017, and 7.5 AU on 1 January 2019.
References
- Marc W. Buie. "Orbit Fit and Astrometric record for 14OE394". SwRI (Space Science Department). Archived from the original on 28 March 2019. Retrieved 17 February 2018.
- ^ Brown, Mike. "How many dwarf planets are there in the outer solar system? (updates daily)". Mike Brown's Planets. Retrieved 24 July 2016.
- ^ "IAU Minor Planet Center - 2014 OE394". Minor Planet Center. International Astronomical Union. Retrieved 24 July 2016.
- ^ "JPL Small-Body Database Browser". Jet Propulsion Laboratory. NASA. Retrieved 24 July 2016.
- "IAU Minor Planet Center".
- "MPEC 2016-O95 : 2014 OE394". Minor Planet Center. International Astronomical Union. Retrieved 24 July 2016.
- Verbiscer, Anne J.; Helfenstein, Paul; Porter, Simon B.; Benecchi, Susan D.; Kavelaars, J. J.; Lauer, Tod R.; et al. (April 2022). "The Diverse Shapes of Dwarf Planet and Large KBO Phase Curves Observed from New Horizons". The Planetary Science Journal. 3 (4): 31. Bibcode:2022PSJ.....3...95V. doi:10.3847/PSJ/ac63a6. 95.
External links
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