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Discovery[1]
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| Discovered by | Lincoln Laboratory Near-Earth Asteroid Research (LINEAR) Team |
| Discovery site | Socorro |
| Discovery date | January 08, 2002 |
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Designations
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| Minor planet category |
amor |
| Epoch 2455000.5 (2009-Jun-18.0) |
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| 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° |
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Physical characteristics
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| 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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