2014 OS393
2014 OS393, unofficially designated e31007AI, e3 and PT2, is a binary trans-Neptunian object in the classical Kuiper belt, the outermost region of the Solar System. It was first observed by the New Horizons KBO Search using the Hubble Space Telescope on 30 July 2014. Until 2015, when the object 486958 Arrokoth was selected, it was a potential flyby target for the New Horizons probe. Estimated to be approximately 42 kilometres (26 mi) in diameter, the object had a poorly determined orbit as it had been observed for only a few months. With MPEC 2024-E99 the Minor Planet Center published on 6 March 2024 additional observations by New Horizons KBO Search-Subaru which allowed to compute a fairly reliable orbit.
2014 OS393 imaged by the New Horizons spacecraft on 5 January 2019 | |
| Discovery | |
|---|---|
| Discovered by | New Horizons KBO Search |
| Discovery site | Hubble Space Telescope |
| Discovery date | 30 July 2014 |
| Designations | |
MPC designation | 2014 OS393 |
Alternative designations | e31007AI · e3 · PT2 |
Minor planet category | TNO · cubewano distant · binary |
| Orbital characteristics | |
| Epoch 8 August 2014 (JD 2456877.5) | |
| Uncertainty parameter 8 | |
| Observation arc | 121 days |
| Aphelion | 45.350 AU |
| Perihelion | 42.534 AU |
Semi-major axis | 43.942 AU |
| Eccentricity | 0.0320 |
Orbital period (sidereal) | 291.29 yr (106,394 d) |
Mean anomaly | 60.464° |
Mean motion | 0° 0m 12.24s / day |
| Inclination | 3.8151° |
Longitude of ascending node | 138.21° |
| 78.660° | |
| Physical characteristics | |
Mean diameter | 30 km (component) 42 km (effective) |
Synodic rotation period | 36.214 h (1.5089 d) |
| 0.04–0.10 0.04–0.15 | |
| V–I = 1.18 | |
| 25.8 | |
| 10.1 10.111 | |
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