| Discovery[1] | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Laboratory ETS |
| Discovery date | 5 October 1999 |
| Designations | |
| (237442) 1999 TA10 | |
| Amor asteroid (NEO)[2] | |
| Orbital characteristics[2] | |
| Epoch 13 January 2016 (JD 2457400.5) | |
| Uncertainty parameter 0 | |
| Observation arc | 5592 days (15.31 yr) |
| Aphelion | 1.8695 AU (279.67 Gm) (Q) |
| Perihelion | 1.1419 AU (170.83 Gm) (q) |
| 1.5057 AU (225.25 Gm) (a) | |
| Eccentricity | 0.24161 (e) |
| 1.85 yr (674.85 d) | |
| 342.45° (M) | |
| 0° 32m 0.42s / day (n) | |
| Inclination | 20.843° (i) |
| 214.68° (Ω) | |
| 84.791° (ω) | |
| Earth MOID | 0.303797 AU (45.4474 Gm) |
| Physical characteristics | |
| Dimensions | 500–1500 meters[2][3] |
| 14 h (0.58 d) | |
| 14 hr(?)[2] | |
| 16.77 (close approach) to 22.29 | |
| 18.1[2] | |
(237442) 1999 TA10, 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]
1999 TA10 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 1999 TA10 originated from the interior of Vesta.[4] The next close approach will be in 2023.[5] In 2086, it will come within 0.017 AU (2,500,000 km; 1,600,000 mi) of Mars.[5]