2019 OU1[a] is a sub-kilometre asteroid, classified as a near-Earth object of the Apollo group.[1][2] On 28 August 2019, the object safely passed 1.028 million kilometres from Earth,[3] travelling at around 13 km/s (47,000 km/h).[2]
Discovery[1] | |
---|---|
Discovered by | Pan-STARRS 1 |
Discovery site | Haleakala Obs. |
Discovery date | 25 July 2019 (first observed) |
Designations | |
2019 OU1 | |
Apollo · NEO [1][2] | |
Orbital characteristics[1][2] | |
Epoch 27 April 2019 (JD 2458600.5) | |
Uncertainty parameter 6[2] · 7[1] | |
Aphelion | 3.673 au |
Perihelion | 0.5748 au |
2.2679 au | |
Eccentricity | 0.61977 |
3.42 years | |
313.73° | |
0° 17m 18.916s / day | |
Inclination | 2.2176° |
145.143° | |
241.08° | |
Earth MOID | 0.0062 au (2.4 LD) |
Jupiter MOID | 1.79 au |
Physical characteristics | |
Mean diameter | 71 m[3] (est. at 0.25)[4] 160 m[5] (est. at 0.05)[4] |
22.87[2] | |
2019 OU1 was first observed on 25 July 2019 by Pan-STARRS 1 at Haleakala Observatory, Hawaii, United States.[1]
2019 OU1 is classified as an Apollo asteroid, which means that it is an Earth-crossing asteroid that has an orbital semi-major axis greater than 1 au but a perihelion distance less than Earth's aphelion distance of 1.017 au.[6]
On 28 August 2019, 2019 OU1 safely passed 0.00687 astronomical units (1.028 million kilometres; 2.67 lunar distances) from Earth,[3] travelling at around 13 km/s (47,000 km/h).[2]
Based on its absolute magnitude of 22.874,[1] 2019 OU1 is estimated to have a diameter of 71–160 metres[5] using an assumed albedo of 0.05 (carbonaceous) and 0.25 (siliceous) respectively.[4]