(237442) 1999 TA10

(237442) 1999 TA10
Discovery[1]
Discovered by Lincoln Laboratory ETS, New Mexico (704)
Discovery date 5 October 1999
Designations
MPC designation (237442) 1999 TA10
Minor planet
category		 Amor asteroid (NEO)[2]
Epoch July 23, 2010 (2455400.5)
Aphelion 1.8694 AU (Q)
Perihelion 1.1420 AU (q)
Semi-major axis 1.5057 AU (a)
Eccentricity 0.24155
Orbital period 1.85 yr
674.85 days
Mean anomaly 355.60° (M)
Inclination 20.842°
Longitude of ascending node 214.71°
Argument of perihelion 84.739°
Physical characteristics
Dimensions 500-1500 meters[2][3]
Sidereal rotation
period		 14 hr(?)[2]
Albedo unknown
Apparent magnitude 16.77 (close approach) to 22.29
Absolute magnitude (H) 17.9[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 on 5 October 1999 at apparent magnitude 17.7,[1] when it was only 0.39 AU from the Earth.[5] In 2010, it came within 0.3 AU of the 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. ^ a b "MPEC 1999-T43 : 1999 TA10". IAU Minor Planet Center. 1999-10-11. http://www.minorplanetcenter.org/mpec/J99/J99T43.html. Retrieved 2011-01-12. 
  2. ^ a b c d e f g "JPL Small-Body Database Browser: 237442 (1999 TA10)". 2010-11-08 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1999TA10. Retrieved 2011-01-12. 
  3. ^ a b "Conversion of Absolute Magnitude to Diameter". Minor Planet Center. http://www.minorplanetcenter.org/iau/lists/Sizes.html. Retrieved 2011-01-12. 
  4. ^ a b "A look into Vesta’s interior". Max Planck Society. 2011-01-06. http://www.mpg.de/877913/Pressrelease20110106. Retrieved 2011-01-07. 
  5. ^ a b c d "JPL Close-Approach Data: 237442 (1999 TA10)". 2010-11-08 last obs. http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=1999TA10;cad=1#cad. Retrieved 2011-01-12. 

External links