Its cumulative impact probability was dropped to 1 in 71 million by 2 November 2011 with an observation arc of 15 days.

The comet has an observation arc of 1,327 days and is still been observed as of April 2011.

It has an observation arc of 41 days with an uncertainty parameter of 7.

This object has a poorly known orbit and was only observed over an observation arc of 17 days.

Due to this short observation arc, the object has a very poorly known orbit and is considered lost.

With an original observation arc of only 22 days, 132 Aethra was a lost asteroid between 1873 and 1922.

Having not been observed since 2004 with a short observation arc of only 3 days and an uncertainty of 9, it is a lost asteroid.

With an observation arc of only 6 days it showed a 1 in 7140 chance of impact on 1 June 2015.

It has an observation arc of 32 days and an orbital uncertainty of 7.

The asteroid has an observation arc of 23 years and has a well determined orbit.