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The U.S. Rosetta Project at its first science target: Asteroid (2867) Steins, 2008

The U.S. Rosetta Project at its first science target: Asteroid (2867) Steins, 2008,10.1109/AERO.2010.5446988,C. Alexander,D. Sweetnam,S. Gulkis,P. Wei

The U.S. Rosetta Project at its first science target: Asteroid (2867) Steins, 2008   (Citations: 1)
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On September 5, 2008, the International Rosetta Mission encountered its first formal science target of the mission, asteroid (2867) Steins. We report preliminary results from the U.S. experiments. NASA's contribution to the Rosetta mission consists of an ultraviolet (UV) spectrometer, a microwave spectrometer, a plasma instrument, and a portion of the electronics package for a mass spectrometer. The UV spectrometer (Alice) was used to obtain the first far-ultraviolet (FUV) spectrum of an asteroid. A ten-minute integration, surrounding the time of closest approach, averaging over a variety of geometries, showed very good signal from 850 A¿ to 2000 A¿ in the FUV. The microwave instrument (MIRO) obtained a high signal to noise measurement at both observing frequencies, enabling key thermal parameters to be derived. The plasma instrument (IES) obtained a brief measurement of the solar wind, and the Double Focusing Mass Spectrometer (DFMS) of the ROSINA instrument obtained a signal just at closest approach. Laboratory work with analogue materials was begun.
Published in 2010.
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    • ...Reports on these periods of the mission have been provided by ESA to the IAF [7, 8, 9], in the literature [10], and at previous IEEE conferences [11, 12, 13, 14]...
    • ...The problem of the boresights that surfaced in the Steins encounter is described more thoroughly elsewhere [13, 14, 15]...
    • ...In our previous paper [14] we discussed the role of the multi-instrument modeling team...

    C. Alexanderet al. The U.S. Rosetta Project at its second science target: Asteroid (21) L...

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