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Impact features on Stardust: implications for comet 81P/Wild 2 dust |
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| Authors: | Hörz Friedrich Bastien Ron Borg Janet Bradley John P Bridges John C Brownlee Donald E Burchell Mark J Chi Miaofang Cintala Mark J Dai Zu Rong Djouadi Zahia Dominguez Gerardo Economou Thanasis E Fairey Sam A J Floss Christine Franchi Ian A Graham Giles A Green Simon F Heck Philipp Hoppe Peter Huth Joachim Ishii Hope Kearsley Anton T Kissel Jochen Leitner Jan Leroux Hugues Marhas Kuljeet Messenger Keiko Schwandt Craig S See Thomas H Snead Christopher Stadermann Frank J Stephan Thomas Stroud Rhonda Teslich Nick Trigo-Rodríguez Josep M Tuzzolino A J Troadec David Tsou Peter Warren Jack |
| Institution: | Astromaterials Research and Exploration Science, NASA Johnson Space Center, Houston, TX 77058, USA. friedrich.p.horz@jsc.nasa.gov |
| Abstract: | Particles emanating from comet 81P/Wild 2 collided with the Stardust spacecraft at 6.1 kilometers per second, producing hypervelocity impact features on the collector surfaces that were returned to Earth. The morphologies of these surprisingly diverse features were created by particles varying from dense mineral grains to loosely bound, polymineralic aggregates ranging from tens of nanometers to hundreds of micrometers in size. The cumulative size distribution of Wild 2 dust is shallower than that of comet Halley, yet steeper than that of comet Grigg-Skjellerup. |
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