(10302) 1989 ML
|Discovered by||E. F. Helin, J. Alu|
|Discovery date||June 29, 1989|
|Alternative names||1992 WA|
|Minor planet category||Amor|
|Epoch June 14, 2006 (JD 2453900.5)|
|Aphelion||216.357 Gm (1.446 AU)|
|Perihelion||164.358 Gm (1.099 AU)|
|Semi-major axis||190.358 Gm (1.272 AU)|
|Orbital period||524.284 d (1.44 a)|
|Average orbital speed||26.28 km/s|
|Longitude of ascending node||104.407°|
|Argument of perihelion||183.249°|
|Mean density||2.0? g/cm³|
|Equatorial surface gravity||0.0002? m/s²|
|Escape velocity||0.0003? km/s|
|Rotation period||? d|
|Absolute magnitude (H)||19.5|
(10302) 1989 ML is an as yet unnamed near-Earth asteroid. It is approximately 0.6 km in diameter. An Amor asteroid, it orbits between Earth and Mars. It is an X-type asteroid, so its surface composition is yet unknown. It was discovered by Eleanor F. Helin and Jeff T. Alu at Palomar Observatory on June 29, 1989.
The Delta-v ('effort') required to reach 1989 ML from a low-Earth orbit is only 4.8 km/s, ranking fifth (as of March 2007) amongst the near-Earth asteroids with well-established orbits. 1989 ML is thus particularly 'easy' (and 'cheap') to reach by spacecraft.
1989 ML was considered as a target of the Japanese spacecraft Hayabusa (then Muses-C) but had to be given up due to technical reasons. It was also considered 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, they too changed to other targets.
- Near-Earth asteroid Delta-v ranking, 1989 ML ranks fourth among the numbered asteroids
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