2019 OU1
# 2019 OU1

2019 $OU_1$ is a sub-kilometre asteroid, classified as a near-Earth object of the Apollo group. On 28 August 2019, the object safely passed 1.028 million kilometres from Earth, travelling at around 13 km/s (47,000 km/h).

## Observation

2019 $OU_1$ was first observed on 25 July 2019 by Pan-STARRS 1 at Haleakala Observatory, Hawaii, United States.

## Orbit and classification

2019 $OU_1$ 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.

### Close approach in 2019

On 28 August 2019, 2019 $OU_1$ safely passed 0.00687 astronomical units (1.028 million kilometres; 2.67 lunar distances) from Earth, travelling at around 13 km/s (47,000 km/h).

## Physical characteristics

Based on its absolute magnitude of 22.874, 2019 $OU_1$ is estimated to have a diameter of 71–160 metres using an assumed albedo of 0.05 (carbonaceous) and 0.25 (siliceous) respectively.

