2002 AT4

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2002 AT4
Discovery[1]
Discovered by Lincoln Laboratory Near-Earth Asteroid Research (LINEAR) Team
Discovery site Socorro
Discovery date January 08, 2002
Designations
Minor planet category amor
Orbital characteristics[2]
Epoch 2455000.5
(2009-Jun-18.0)
Aphelion 2.7011919
± 1.5365e-07 AU
Perihelion 1.03109830
± 6.2285e-08 AU
Semi-major axis 1.8661451
± 1.0615e-07 AU
Eccentricity .44747153
± 4.4996e-08
Orbital period 931.14336 ± 7.9447e-05 d
2.55 ± 2.175e-07 year
Mean anomaly 309.56861
± 9.1649e-05°
Inclination 1.506373
± 6.6406e-06°
Longitude of ascending node 323.69218
± 7.8357e-05°
Argument of perihelion 202.75806
± 8.0947e-05°
Physical characteristics
Dimensions Diameter: 170-380 m
Absolute magnitude (H) 20.897

2002 AT4 (also written 2002 AT4) is an as yet unnamed and un-numbered near-Earth asteroid. It is approximately 160–370 metres in diameter. It has an eccentric orbit that brings it sometimes close to Earth's orbit, and sometimes halfway between Mars and Jupiter. It is a D-type asteroid[3] which means that it may be reddish in colour, and it orbits amongst the amor family of asteroids.

Due to its relatively low transfer cost of ~5.5 km/s,[4] 2002 AT4 was under consideration by the European Space Agency as a candidate target for the Don Quijote mission to study the effects of impacting a spacecraft into an asteroid; however, it is no longer under consideration.[1]

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