846 Lipperta

846 Lipperta is a slowly rotating Themistian asteroid located in the asteroid belt at a distance of 3.1 AU. It has a slow rotation period of 1641 hours making it one of the slowest rotating objects in the solar system discovered.
Based on lightcurve studies, Lipperta has a rotation period of 1641 hours, but this figure is based on less than full coverage, so that the period may be wrong by 30 percent. The lack of variation in brightness could be caused by very slow rotation, near pole-on viewing aspect, or a spherical body with uniform albedo.
It has been claimed that 846 Lipperta may show comet-like activity but this claim is unconfirmed.