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Observations of comet 19P/Borrelly from the Miniature Integrated Camera and Spectrometer (MICAS) aboard Deep Space 1

Soderblom, L.A. und Boice, D.C. und Britt, D.T. und Brown, R.H. und Buratti, B.J. und Hicks, M.D. und Nelson, R.M. und Oberst, J. und Sandel, B.R. und Stern, S.A. und Thomas, N. und Yelle, R.V. (2001) Observations of comet 19P/Borrelly from the Miniature Integrated Camera and Spectrometer (MICAS) aboard Deep Space 1. In: Bulletin of the American Astronomical Society, 33, Seite 1087. American Astronomical Society, DPS Meeting #33, # 26.02, New Orleans, 27. Nov. - 1 Dec. 2001.

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Kurzfassung

Images from the DS1 MICAS CCD camera reveal in three dimensions, the complex characteristics of Borrelly's nucleus, coma, and jets. The images acquired during the last 2 hours of the approach, as the nucleus became resolved and grew to roughly 150 pixels in length, provide stereo coverage of both the nucleus and inner coma over a wide range of phase angle and exposure time. The principal structure in the coma is a sunward-pointed collimated jet that is also visible in ground-based images. This jet is canted about 30 degrees off the sun line and appears to be roughly aligned with the local vertical at the surface from where it originates. Long-exposure images reveal details of the structure of the inner coma. They show the jet, visible at long range, to be composed of at least three discrete components whose locations evidently correspond to specific surface features. The elongated nucleus exhibits topographically distinct terrains and strong albedo variegations (of at least a factor of 2). The jets emanate from within the brighter smoother rolling plains. A consistent model is that the main jets are co-aligned with the rotation axis of the nucleus and issue from regions on the plains that are currently in constant sunlight. The other major terrain is a rough unit that is darker than the average, includes even darker isolated spots, and appears as a jumbled topography. Other surface features include parallel ridges, crater-like depressions, numerous narrow dark fracture-like features, and areas of mottled albedo. However no small fresh impact craters are evident attesting to a geologically young, actively evolving surface.

Dokumentart:Konferenzbeitrag (Paper)
Zusätzliche Informationen: LIDO-Berichtsjahr=2004,
Titel:Observations of comet 19P/Borrelly from the Miniature Integrated Camera and Spectrometer (MICAS) aboard Deep Space 1
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Soderblom, L.A.U.S. Geological Survey, Flagstaff, AZ
Boice, D.C.Southwest Research Institute, San Antonio, TX
Britt, D.T.University of Tennessee
Brown, R.H.Southwest Research Institute, Boulder, CO
Buratti, B.J.Jet Propulsion Laboratory, Pasadena, CA
Hicks, M.D.Jet Propulsion Laboratory, Pasadena, CA
Nelson, R.M.Jet Propulsion Laboratory, Pasadena, CA
Oberst, J.NICHT SPEZIFIZIERT
Sandel, B.R.University of Arizona, Tucson, AZ
Stern, S.A.Southwest Research Institute, Boulder, CO
Thomas, N.Max-Planck-Institut für Aeronomie, Katlenburg-Lindau
Yelle, R.V.Northern Arizona University
Datum:2001
Erschienen in:Bulletin of the American Astronomical Society
Band:33
Seitenbereich:Seite 1087
Name der Reihe:Bulletin of the American Astronomical Society
Status:veröffentlicht
Veranstaltungstitel:American Astronomical Society, DPS Meeting #33, # 26.02, New Orleans, 27. Nov. - 1 Dec. 2001
Veranstalter :American Astronomical Society
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EW - Erforschung des Weltraums
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EW - Erforschung des Weltraums
DLR - Teilgebiet (Projekt, Vorhaben):NICHT SPEZIFIZIERT
Standort: Berlin-Adlershof
Institute & Einrichtungen:Institut für Weltraumsensorik und Planetenerkundung
Hinterlegt von: Susanne Pieth
Hinterlegt am:08 Dez 2005
Letzte Änderung:14 Jan 2010 19:32

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