Английская Википедия:2010 TD54
Шаблон:Mp 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.[1]
Orbit and classification
Шаблон:Mp 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.[2]
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.[3]
Close approach
Шаблон:Mp made its closest approach at 10:51, 12 October 2010 UTC (6:51 EDT a.m.) at Шаблон:Convert. 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 SurveyШаблон:'s telescopes north of Tucson, Arizona on 9 October 2010.[1]
It has an Earth minimum orbit intersection distance of Шаблон:Convert, which corresponds to 0.0693 lunar distance.[2] It was removed from the Sentry Risk Table on 11 October 2010.[4] The asteroid may have passed Шаблон:Convert from Earth in October 1979, but the nominal orbit suggests it passed millions of kilometres from Earth in 1979.[2]
Physical characteristics
Шаблон:Mp is a stony asteroid, characterized as a Srv subtype.[5]
Rotation period
In November 2010, a rotational light curve of Шаблон:Mp 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 (Шаблон:Small). A high amplitude typically indicates that the body has an irregular, elongated rather than spherical shape.Шаблон:Efn This result supersedes a previously obtained lightcurve with a shorter period of 0.01167 hours (Шаблон:Small).[6]
Diameter and albedo
The Collaborative Asteroid Lightcurve Link assumes a standard albedo for stony asteroids of 0.20 and calculates a diameter of Шаблон:Convert based on an absolute magnitude of 28.9.[7] NASA's press release gave an estimated diameter of 5 to 10 meters (16 to 33 feet).[1]
See also
- List of asteroid close approaches to Earth, for other close approaches
- List of asteroid close approaches to Earth in 2010
Notes
References
External links
- Asteroid 2010 TD54's Orbit Around the Sun
- Small Asteroid to Pass Within Earth-Moon System Tuesday 10.11.10
- The near-Earth asteroid 2010 TD54: The fastest rotating natural body known in the solar system? 29 Oct 2010
- Asteroid Lightcurve Database (LCDB), query form (info Шаблон:Webarchive)
- Шаблон:NeoDys
- Шаблон:ESA-SSA
- Шаблон:JPL small body
Шаблон:Small Solar System bodies Шаблон:Authority control
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