 The orbit of2017 OO1 and positions on 8/1/2017 | |
| Discovery[1] | |
|---|---|
| Discovered by | ATLAS-MLO |
| Discovery site | Mauna Loa Obs. |
| Discovery date | 23 July 2017 (first observed only) |
| Designations | |
| 2017 OO1 | |
| NEO · Aten[1][2] | |
| Orbital characteristics[2] | |
| Epoch 23 March 2018 (JD 2458200.5) | |
| Uncertainty parameter 4 | |
| Observation arc | 9 days |
| Aphelion | 1.0173AU |
| Perihelion | 0.7714 AU |
| 0.8943 AU | |
| Eccentricity | 0.1375 |
| 309 days | |
| 97.402° | |
| 1° 9m 55.08s / day | |
| Inclination | 20.026° |
| 298.31° | |
| 186.14° | |
| Earth MOID | 0.0001982 AU (0.0771 LD) |
| Physical characteristics | |
| 35 m(est. at0.24)[3] 35–77 m(estimate)[4] 76 m(est. at0.05)[3] | |
| 24.5[2] | |
2017 OO1 is a smallasteroid, classified asnear-Earth object of theAten group, approximately 35–76 meters (115–249 feet) in diameter. It was first observed on 23 July 2017, by the roboticATLAS survey atMauna Loa Observatory, Hawaii, two days after the object had approached Earth at 0.33lunar distances on 21 July 2017.[1][2]
2017 OO1 is a member of theAten asteroid, a subgroup ofnear-Earth objects that are located in the zone of influence ofVenus. Atens are a much smaller group than theApollo andAmor asteroids.
The object has an exceptionally lowminimum orbital intersection distance with Earth of 29,650 kilometers or 0.077lunar distances (LD).[2] It orbits the Sun at a distance of 0.77–1.02 AU once every 10 months (309 days;semi-major axis of 0.89 AU). Its orbit has aneccentricity of 0.14 and aninclination of 20° with respect to theecliptic.[2] The body'sobservation arc begins with an observation made by the space-basedWide-field Infrared Survey Explorer on 22 July 2017, one day after its close flyby and a day before its official first observation.[1]
On 21 July 2017, at 03:32 UT, it flew past Earth at a nominal distance of 127,500 kilometers (0.33 LD) with a relative velocity of 10.36 km/s.[4] All future encounters with Earth will occur at a significantly larger distance.[2]
Based on a generic magnitude-to-diameter conversion,2017 OO1 measures between 35–76 meters (115–249 feet) in diameter, for anabsolute magnitude of 24.5, and an assumedalbedo between 0.05 and 0.24, which represent typical values forcarbonaceous andstony asteroids, respectively.[3] As of 2018, no rotationallightcurve has been obtained fromphotometric observations. The body'srotation period,pole and shape remain unknown.[2]
Thisminor planet has neither been numbered nornamed by theMinor Planet Center.[1]
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