(10302) 1989 ML
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| Discovery A | |
|---|---|
| Discoverer | E. F. Helin, J. Alu |
| Discovery date | June 29, 1989 |
| Alternate designations B |
1992 WA |
| Category | Amor |
| Orbital elements C | |
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| Eccentricity (e) | 0.137 |
| Semi-major axis (a) | 190.358 Gm (1.272 AU) |
| Perihelion (q) | 164.358 Gm (1.099 AU) |
| Aphelion (Q) | 216.357 Gm (1.446 AU) |
| Orbital period (P) | 524.284 d (1.44 a) |
| Mean orbital speed | 26.28 km/s |
| Inclination (i) | 4.378° |
| Longitude of the ascending node (Ω) |
104.407° |
| Argument of perihelion (ω) |
183.249° |
| Mean anomaly (M) | 285.977° |
| Physical characteristics D | |
| Dimensions | 0.6 km |
| Mass | 2.3×1011? kg |
| Density | 2.0? g/cm³ |
| Surface gravity | 0.0002? m/s² |
| Escape velocity | 0.0003? km/s |
| Rotation period | ? d |
| Spectral class | X |
| Absolute magnitude | 19.5 |
| Albedo (geometric) | 0.10? |
| Mean surface temperature |
? |
(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 29 June 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 target of the Japanese spacecraft Hayabusa (then Muses-C) but had to be given up due to technical reasons. It is one of two asteroids 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.
[edit] External links
- Near-Earth asteroid Delta-v ranking, 1989 ML ranks fourth among the numbered asteroids
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