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〕 |discoverer = Lincoln Laboratory Near-Earth Asteroid Research (LINEAR) Team |discovery_site = Socorro |discovered = January 08, 2002 |mp_name = |mp_category = amor |alt_names = |orbit_ref = |epoch = 2455000.5 (2009-Jun-18.0) |aphelion = 2.7011919 ± 1.5365e-07 AU |perihelion = 1.03109830 ± 6.2285e-08 AU |semimajor = 1.8661451 ± 1.0615e-07 AU |eccentricity = .44747153 ± 4.4996e-08 |period = |avg_speed = |inclination = 1.506373 ± 6.6406e-06° |asc_node = 323.69218 ± 7.8357e-05° |mean_anomaly = 309.56861 ± 9.1649e-05° |arg_peri = 202.75806 ± 8.0947e-05° |satellites = |dimensions = |mass = |density = |surface_grav = |escape_velocity = |sidereal_day = |axial_tilt = |pole_ecliptic_lat = |pole_ecliptic_lon = |albedo = |temp_name1 = |mean_temp_1 = |max_temp_1 = |temp_name2 = |max_temp_2 = |spectral_type = |abs_magnitude = 20.897 }} (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 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, 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.() ==External links== * * (MPEC 2002-A53 ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「2002 AT4」の詳細全文を読む スポンサード リンク
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