A study of trajectories to the Neptune system using gravity assists
- 作者：C.R.H. Soló ; rzano ; A.A. Sukhanov ; A.F.B.A. Prado
- 关键词：Astrodynamics ; Swing-by ; Orbital maneuvers ; Neptune mission
- 刊名：Advances in Space Research
- 出版年：2007
- 期刊代码：6_02731177
- 类别：et
- 出版时间：2007
- 卷：40
- 期：1
- 页码：125-133
- 文件大小：1067 K
摘要
At the present time, the search for the knowledge of our Solar System continues effective. NASA’s Solar System Exploration theme listed a Neptune mission as one of its top priorities for the mid-term (2008–2013). From the technical point of view, gravity assist is a proven technique in interplanetary exploration, as exemplified by the missions Voyager, Galileo, and Cassini. Here, a mission to Neptune for the mid-term (2008–2020) is proposed, with the goal of studying several schemes for the mission. A direct transfer to Neptune is considered and also Venus, Earth, Jupiter, and Saturn gravity assists are used for the transfer to Neptune, which represent new contributions for a possible real mission. We show several schemes, including or not the braking maneuver near Neptune, in order to find a good compromise between the ΔV and the time of flight to Neptune. After that, a study is made to take advantage of an asteroid flyby opportunity, when the spacecraft passes by the main asteroid belt. Results for a mission that makes an asteroid flyby with the asteroid 1931 TD3 is shown.