| Minorplanet: | yes |
| Background: |
|
| Discovery Ref: | [1] |
| Discoverer: | LINEAR |
| Discovery Site: | Lincoln Laboratory ETS |
| Discovered: | 5 October 1999 |
| Mp Category: | Amor asteroid (NEO) |
| Orbit Ref: | [2] |
| Epoch: | 13 January 2016 (JD 2457400.5) |
| Aphelion: | 1.8695abbr=onNaNabbr=on (Q) |
| Perihelion: | 1.1419AU (q) |
| Semimajor: | 1.5057AU (a) |
| Eccentricity: | 0.24161 (e) |
| Period: | 1.85 yr (674.85 d) |
| Inclination: | 20.843° (i) |
| Asc Node: | 214.68° (Ω) |
| Mean Anomaly: | 342.45° (M) |
| Arg Peri: | 84.791° (ω) |
| Dimensions: | 500–1500 meters[3] |
| Sidereal Day: | 14 hr(?) |
| Magnitude: | 16.77 (close approach) to 22.29 |
| Abs Magnitude: | 18.1 |
| Mean Motion: | / day (n) |
| Rotation: | 14abbr=onNaNabbr=on |
| Observation Arc: | 5592 days (15.31 yr) |
| Uncertainty: | 0 |
| Moid: | 0.303797AU |
, provisionally known as 1999 TA10, is a near-Earth object (NEO) from the Amor asteroid group.[2] It is suspected of being an inner fragment of the differentiated asteroid 4 Vesta.[4]
Given an absolute magnitude (H) of 17.9,[2] and that the albedo is unknown, this NEO could vary from 500 to 1500 meters in diameter.[3]
was discovered by LINEAR at Lincoln Laboratory ETS on 5 October 1999 at apparent magnitude 17.7,[1] when it was only 0.39 AU from Earth.[5] In 2010, it came within 0.3 AU of Earth.[5] During the 2010 close approach, NASA Infrared Telescope Facility (NASA IRTF) studies suggested that originated from the interior of Vesta.[4] The next close approach will be in 2023.[5] In 2086, it will come within 0.017abbr=onNaNabbr=on of Mars.[5]