2011 GA

is a Near-Earth object and Apollo asteroid that passed close to the Earth on 15 October 2023. Due to its size and low MOID, it is classified as a potentially hazardous asteroid.

Observations

2011 GA was discovered on 1 April 2011 by Andrea Boattinti, who was working for the Mount Lemmon Survey.
In the days just after the close approach, the asteroid was observed by the Goldstone Solar-System Radar.

Orbit and physical characteristics

The orbit and size of makes it a potentially hazardous asteroid. 2011 GA passed within of the Earth on 15 October 2023. The asteroid also passed within from Earth around 15 October 1977. For comparison, the distance to the Moon is about 0.0026 AU.
2011 GA has a rotation period of about 4.4 hours. Radar images of the asteroid showed a smooth, regular shape.
The Jupiter Tisserand invariant, used to distinguish different kinds of orbits, is 3.826.