Europa planetary protection for Juno Jupiter Orbiter
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- 作者：Douglas E. Bernard ; Robert D. Abelson ; Jennie R. Johannesen ; Try Lam ; William J. McAlpine ; Laura E. Newlin
- 关键词：Juno ; Jupiter ; Planetary protection ; Europa ; Jet Propulsion Laboratory ; NASA
- 刊名：Advances in Space Research
- 出版年：2013
- 出版时间：1 August, 2013
- 年：2013
- 卷：52
- 期：3
- 页码：547-568
- 全文大小：4158 K
文摘
NASA¡¯s Juno mission launched in 2011 and will explore Jupiter and its near environment starting in 2016. Planetary protection requirements for avoiding the contamination of Europa have been taken into account in the Juno mission design. In particular Juno¡¯s polar orbit, which enables scientific investigations of parts of Jupiter¡¯s environment never before visited, also greatly assist avoiding close flybys of Europa and the other Galilean satellites.
The science mission is designed to conclude with a deorbit burn that disposes of the spacecraft in Jupiter¡¯s atmosphere. Compliance with planetary protection requirements is verified through a set of analyses including analysis of initial bioburden, analysis of the effect of bioburden reduction due to the space and Jovian radiation environments, probabilistic risk assessment of successful deorbit, Monte-Carlo orbit propagation, and bioburden reduction in the event of impact with an icy body.