enough for its surface to have collapsed into a spheroid, is emboldened. Unconfirmed moons A sixth candidate for an irregular satellite of Neptune, designated 'c02N4', was discovered in a survey led by Matthew J. Holman on 14 August 2002, but was only seen again by the Very Large Telescope on 3 September 2002 before being lost thereafter. Further attempts to recover the object failed, leaving its orbit undetermined. It may have been a centaur instead of a satellite, although its small amount of motion relative to Neptune over a month suggests that it was indeed a satellite. Based on its brightness, the object was estimated to have a diameter of 33 km and to have been about 25.1 million km (0.168 AU) from Neptune when it was found. See also List of natural satellites Notes References External links Scott S. Sheppard: Neptune Moons Neptune's Moons by NASA's Solar System Exploration Gazetteer of Planetary Nomenclature—Neptune (USGS) Simulation showing the position of Neptune's Moon Lists of moons Articles containing video clips