2017 OO1
2017 OO1 is a small asteroid, classified as near-Earth object of the Aten group, approximately 35–76 meters (115–249 feet) in diameter. It was first observed on 23 July 2017, by the robotic ATLAS survey at Mauna Loa Observatory, Hawaii, two days after the object had approached Earth at 0.33 lunar distances on 21 July 2017.
The orbit of 2017 OO1 and positions on 8/1/2017 | |
| Discovery | |
|---|---|
| Discovered by | ATLAS-MLO |
| Discovery site | Mauna Loa Obs. |
| Discovery date | 23 July 2017 (first observed only) |
| Designations | |
MPC designation | 2017 OO1 |
Minor planet category | NEO · Aten |
| Orbital characteristics | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 9 days |
| Aphelion | 1.0173 AU |
| Perihelion | 0.7714 AU |
Semi-major axis | 0.8943 AU |
| Eccentricity | 0.1375 |
Orbital period (sidereal) | 309 days |
Mean anomaly | 97.402° |
Mean motion | 1° 9m 55.08s / day |
| Inclination | 20.026° |
Longitude of ascending node | 298.31° |
| 186.14° | |
| Earth MOID | 0.0001982 AU (0.0771 LD) |
| Physical characteristics | |
Mean diameter | 35 m (est. at 0.24) 35–77 m (estimate) 76 m (est. at 0.05) |
| 24.5 | |
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