2013 BS45 was discovered by James V. Scotti on 20 January 2013, observing for the Spacewatch project from Kitt Peak (KPNO).
[6] Upon discovery, it was classified as an Aten asteroid but also an Earth crosser by the Minor Planet Center.
[2] 2013 BS45 has an absolute magnitude of 25.9 which gives a characteristic diameter of 30 m.[5] Radar observations indicate that it may be a very rapid rotator with a period of just a few minutes.
[2] Its orbit matches the expected properties of that of an object in the Arjuna class.
[9] 2013 BS45 may have originated within the Venus-Earth-Mars region; alternatively, it may have come from the main asteroid belt like other Near-Earth Objects, then transitioned to an Amor-class asteroid before entering Earth's co-orbital region.