(48639) 1995 TL8

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Template:Mp is a binary trans-Neptunian object from the scattered disc in the outermost regions of the Solar System. It was discovered by Arianna Gleason in 1995 and measures approximately 176 kilometers in diameter. Its 80-kilometer minor-planet moon, provisionally designated Template:Mp, was discovered on 9 November 2002.[1]

Discovery

Template:Mp was discovered on 15 October 1995, by American astronomer Arianna Gleason as part of UA's Spacewatch survey at Kitt Peak National Observatory, near Tucson, Arizona.[2]

It was the first of the bodies presently classified as a scattered-disc object (SDO)[3]Script error: No such module "Unsubst". to be discovered, preceding the SDO prototype Template:Mpl by almost a year.[4]

Satellite

File:1995TL8.gif
Animation of two Hubble images of Template:Mp's satellite in August 2001

A companion was discovered by Denise C. Stephens and Keith S. Noll, from observations with the Hubble Space Telescope taken on 9 November 2002, and announced on 5 October 2005. The satellite is relatively large, having a likely mass of about 10% of the primary. Its orbit has not been determined, but it was at a separation of only about Script error: No such module "convert". to the primary at the time of discovery, with a possible orbital period of about half a day and an estimated diameter of Script error: No such module "convert"..[1]

File:1995 TL8 binary-earth comparison.jpg
A relative size and distance comparison of the Template:Mp system with the Earth–Moon system. The scale of the Earth–Moon system has been reduced so Earth appears the same size as the Template:Mp primary.

Scattered–extended object

Template:Mp is classified as detached object (scattered–extended) by the Deep Ecliptic Survey, since its orbit appears to be beyond significant gravitational interactions with Neptune's current orbit.[5] However, if Neptune migrated outward, there would have been a period when Neptune had a higher eccentricity.

Simulations made in 2007 show that Template:Mp appears to have less than a 1% chance of being in a 3:7 resonance with Neptune, but it does execute circulations near this resonance.[6]

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Numbering and naming

This minor planet was numbered by the Minor Planet Center on 20 November 2002.[7] As of 2025, it has not been named.[2]

See also

Notes

Template:Notelist

References

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External links

Template:Trans-Neptunian objects Script error: No such module "Navbox". Script error: No such module "Navbox". Template:Authority control

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