2012 TC4

For the titanium alloy, see Ti-6Al-4V.

2012 TC4
Radar movie of 2012 TC4[1]
Discovery[2][3]
Discovered byPan-STARRS 1
Discovery siteHaleakala Obs.
Discovery date4 October 2012
Designations
2012 TC4
Orbital characteristics[2]
Epoch 1 October 2017 (JD 2458027.5)
Uncertainty parameter 1
Observation arc5.19 yr (1,897 d)
Aphelion1.8786 AU
Perihelion0.9335 AU
1.4061 AU
Eccentricity0.3361
1.67 yr (609 d)
332.79°
0° 35m 27.96s / day
Inclination0.8572°
198.23°
222.58°
Earth MOID0.000149 AU (0.0580 LD)
Mars MOID0.03 AU[4]
Physical characteristics
Dimensions15 m × 8 m[5][6]
7–13 m[7][8]
15 m[8]
  • 0.35±0.1[7]
  • 0.30±0.01 (radiometric)
12.9–31[10]

2012 TC4 is a tumbling micro-asteroid classified as a bright near-Earth object of the Apollo group, approximately 10 meters (30 feet) in diameter.[6][7][8] It was first observed by Pan-STARRS at Haleakala Observatory on the Hawaiian island of Maui, in the United States. As of 1 October 2017, it had a small Earth minimum orbital intersection distance of 0.000149 AU (22,300 km).[2] On 12 October 2017, it passed Earth at 0.00033524 AU (50,151 km).[2] The asteroid was removed from the Sentry Risk Table on 16 October 2017[11] and with a 5-year observation arc has a well-known orbit.[2] For example, on the previously risk-listed date of 12 October 2022,[12] it is now known that the asteroid will be more than 3 AU (450 million km) from Earth.[13]

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  6. ^ a b c Cite error: The named reference 2017RadarUpdate was invoked but never defined (see the help page).
  7. ^ a b c d e Cite error: The named reference Ryan-2017 was invoked but never defined (see the help page).
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  9. ^ a b c Cite error: The named reference lcdb was invoked but never defined (see the help page).
  10. ^ a b Cite error: The named reference NEODyS was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference removed was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference summary was invoked but never defined (see the help page).
  13. ^ Cite error: The named reference Horizons2022 was invoked but never defined (see the help page).


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