Target Asteroids
铁镍超新星核合成
- 铁镍丰度
- r-过程，重元素合成与丰度
- 双中子星对撞事件合成黄金
成核引力层析
- 热化
- https://en.wikipedia.org/wiki/Planetary_differentiation#Gravitational_separation
- https://en.wikipedia.org/wiki/Goldschmidt_classification
碰撞解体形成小行星带
- 木星轨道扰动
NEA近地小行星
- 组分
- 轨道分布
Detail of NEA
Included minor planets and comets.
NEO/NEA Near-Earth Asteroid
Requirements
- 面对太阳
- 避开阴影
- 焦点集中在自转轴极点
- 可利用缓慢进动/其他自转减速机制
Simulations of directed energy thrust on rotating asteroids
(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.[3]
Size, Albedo, and Taxonomic Type of Potential Spacecraft Target Asteroid (10302) 1989 ML
https://forum.nasaspaceflight.com/