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Ptolemy operations and results during the Lutetia flyby

机译:Lutetia飞越期间托勒密行动及结果

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摘要

The September 5th 2008 Rosetta flyby of asteroid 2867 Steins raised tantalising questions concerning the possibility of outgassing and extant exospheres surrounding small bodies within the asteroid belt. With this in mind and recognising the size and composition of asteroid 21 Lutetia it was decided to attempt a detection of such possible outgassing using a number of Rosetta instruments, including Ptolemy, a miniature gas chromatograph isotope ratio mass spectrometer aboard the lander Philae. Ptolemy collected 5 sets of mass spectra at hourly intervals during the Lutetia encounter; 2 background measurements either side of close approach and an exosphere detection measurement as the spacecraft passed over the subsolar point. An increase in pressure was detected at the subsolar point but the cause (exosphere or spacecraft) was unresolved with the realisation that any such detection is hindered by outgassing from the spacecraft and instrument itself. Constraints are placed on the properties of Lutetia exosphere, structure and production rates. The experience gained is used to provide suggestions for future missions or spacecraft events aimed at the detection and characterisation of the exospheres of Solar System bodies.
机译:2008年9月5日,小行星2867 Steins的罗塞塔号飞越,引发了有关小行星带内小物体周围放气和现存外层大气的可能性的诱人问题。考虑到这一点并认识到小行星21 Lutetia的大小和组成后,决定尝试使用许多Rosetta仪器(包括登陆器Philae上的微型气相色谱同位素比质谱仪Ptolemy)检测这种可能的放气。托勒密在鲁特西亚遭遇期间每隔一小时收集5组质谱图。航天器越过太阳下点时,有2个背景测量值(靠近方法的任一侧)和大气圈探测值。在太阳下点检测到压力升高,但是原因(外层空间或航天器)无法解决,因为意识到任何这样的检测都会受到航天器和仪器自身排气的阻碍。限制了Lutetia外球的性质,结构和生产率。所获得的经验用于为将来的任务或航天器事件提供建议,这些任务或目标是旨在探测和表征太阳系天体的外层。

著录项

  • 来源
    《Planetary and space science》 |2012年第1期|p.179-186|共8页
  • 作者单位

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

    Planetary and Space Sciences Research Institute, The Open University, Walton Hall, Milton Keynes, MK7 6AA, UK;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    rosetta; ptolemy; 21 lutetia; asteroid; comet; exosphere;

    机译:罗塞塔;上肢;21黄体;小行星;彗星;外层;

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