A Low Cost Rendezvous Mission to 99942 Apophis

R. Howard, R. Gillett
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引用次数: 2

Abstract

In recent years the public has become more aware of the potentially catastrophic consequences of an asteroid collision with Earth. Congress has taken note of this and instructed NASA to develop a program to determine the resources required to detect, track, characterize, and, if necessary, mitigate potentially hazardous objects. Characterization of an asteroid deemed sufficiently dangerous requires a space mission to determine its key attributes with sufficient accuracy to implement a mitigation scheme. Characterization mission designs to date have been based on the NASA Discovery mission model. This paper presents an approach for reducing the cost of NEO characterization missions by adapting low cost spacecraft and launch vehicle designs now in production by Orbital Sciences. Specifically, we show how the configuration of one of Orbital's small spacecraft designs coupled with a liquid propulsion system from an Orbital GEO communications spacecraft design is adapted to support delivery of a small science payload to the potentially hazardous near Earth asteroid 99942 Apophis. Using a C3 of less than 10 km2/s2, the Minotaur V low cost launch vehicle will place the spacecraft at Apophis in 321 days from a 2 May 2012 launch.
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到阿波菲斯99942的低成本会合任务
近年来,公众越来越意识到小行星与地球相撞的潜在灾难性后果。国会已经注意到这一点,并指示NASA制定一项计划,以确定探测、跟踪、表征并在必要时减轻潜在危险物体所需的资源。对被认为足够危险的小行星进行定性,需要空间任务以足够的精度确定其关键属性,以便实施减缓计划。迄今为止,表征任务的设计都是基于NASA的“发现”任务模型。本文提出了一种通过采用轨道科学公司目前正在生产的低成本航天器和运载火箭设计来降低近地天体表征任务成本的方法。具体来说,我们展示了如何将轨道公司的一种小型航天器设计与轨道GEO通信航天器设计的液体推进系统相结合,以支持向潜在危险的近地小行星99942阿波菲斯运送小型科学有效载荷。使用小于10 km2/s2的C3, Minotaur V低成本运载火箭将在2012年5月2日发射后的321天内将航天器放置在阿波菲斯。
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