(237442) 1999 TA10

(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]

(237442) 1999 TA10
Discovery[1]
Discovered byLINEAR
Discovery siteLincoln Laboratory ETS
Discovery date5 October 1999
Designations
(237442) 1999 TA10
Amor asteroid (NEO)[2]
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc5592 days (15.31 yr)
Aphelion1.8695 AU (279.67 Gm) (Q)
Perihelion1.1419 AU (170.83 Gm) (q)
1.5057 AU (225.25 Gm) (a)
Eccentricity0.24161 (e)
1.85 yr (674.85 d)
342.45° (M)
0° 32m 0.42s / day (n)
Inclination20.843° (i)
214.68° (Ω)
84.791° (ω)
Earth MOID0.303797 AU (45.4474 Gm)
Physical characteristics
Dimensions500-1500 meters[2][3]
14 h (0.58 d)
14 hr(?)[2]
16.77 (close approach) to 22.29
18.1[2]

    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]

    See also

    References
    1. "MPEC 1999-T43 : 1999 TA10". IAU Minor Planet Center. 11 October 1999. Retrieved 12 January 2011.
    2. "JPL Small-Body Database Browser: 237442 (1999 TA10)" (last observation: 2010-11-08). Retrieved 7 April 2016.
    3. "Conversion of Absolute Magnitude to Diameter". Minor Planet Center. Archived from the original on 27 October 2010. Retrieved 12 January 2011.
    4. "A look into Vesta's interior". Max Planck Society. 6 January 2011. Archived from the original on 13 January 2011. Retrieved 7 January 2011.
    5. "JPL Close-Approach Data: 237442 (1999 TA10)" (2010-11-08 last obs). Retrieved 12 January 2011.
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