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2010 TD54

Near-Earth micro-asteroid

Field	Value
minorplanet	yes
name
background	#FFC2E0
image	Asteroid 2010TD54 orbit.jpg
caption	Orbital diagram of during its near-Earth encounter on 12 Oct 2010
discovery_ref
discoverer	Mount Lemmon Srvy.
discovery_site	Mount Lemmon Obs.
discovered	9 October 2010
mpc_name
mp_category	NEOApollo
orbit_ref
epoch	21 November 2025 (JD 2461000.5)
uncertainty	6
observation_arc	3 days
aphelion	3.2371 AU
perihelion	0.7053 AU
semimajor	1.9712 AU
eccentricity	0.6422
period	2.77 yr (1,011 days)
mean_anomaly	147.92°
mean_motion	/ day
inclination	4.2945°
asc_node	18.123°
arg_peri	76.641°
moid	0.001444 AU
0.562 LD
dimensions	5 m
5–10 m
rotation	0.01167 h (dated)
0.0229317 h
albedo	0.20 (assumed)
spectral_type	Srv
abs_magnitude	28.9

0.562 LD 5–10 m 0.0229317 h

**** is a tiny asteroid and fast rotator, classified as a near-Earth object of the Apollo group, approximately 5 meters in diameter. It was first observed by the Mount Lemmon Survey in October 2010, when the asteroid crossed through the Earth-moon system and had a close encounter with Earth.

Orbit and classification

orbits the Sun at a distance of 0.7–3.2 AU once every 2 years and 9 months (1,011 days). Its orbit has an eccentricity of 0.64 and an inclination of 4° with respect to the ecliptic.

The body's observation arc begins with its first observations by the Mount Lemmon Survey and only spans over a period of 3 days until 12 October 2010. It has been observed since then.

Close approach

made its closest approach at 10:51, 12 October 2010 UTC (6:51 EDT a.m.) at 0.000346 AU. It is one of the closest known approaches of an asteroid to Earth, at which time the object appeared at a magnitude of 14. It was first observed by of the Catalina Sky Surveys telescopes north of Tucson, Arizona on 9 October 2010.

It has an Earth minimum orbit intersection distance of 0.00144418 AU, which corresponds to 0.562 lunar distance. It was removed from the Sentry Risk Table on 11 October 2010. The asteroid may have passed 0.0009 AU from Earth in October 1979, but the nominal orbit suggests it passed millions of kilometres from Earth in 1979.

Physical characteristics

is a stony asteroid, characterized as a Srv subtype.

Rotation period

In November 2010, a rotational light curve of was obtained from photometric observations, which showed that the asteroid is a fast rotator. Light curve analysis gave a well-defined rotation period of 0.0229317 hours (1 minute and 23 seconds) with a brightness amplitude of 0.92 magnitude (). A high amplitude typically indicates that the body has an irregular, elongated rather than spherical shape. This result supersedes a previously obtained lightcurve with a shorter period of 0.01167 hours ().

Diameter and albedo

The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of 5 m based on an absolute magnitude of 28.9. NASA's press release gave an estimated diameter of 5 to.

Notes

References

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

apollo-asteroids minor-planet-object-articles-(unnumbered) earth-crossing-asteroids near-earth-objects-removed-from-the-sentry-risk-table fast-rotating-minor-planets near-earth-objects-in-2010 astronomical-objects-discovered-in-2010

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