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A Model for Rotation and Shape of Asteroid 9969 Braille from Ground-Based Observations and Images Obtained during the Deep Space 1 (DS1) Flyby

Oberst, J. and Mottola, S. and Martino, S. di and Hicks, M. and Buratti, B. and Soderblom, L. and Thomas, N. (2001) A Model for Rotation and Shape of Asteroid 9969 Braille from Ground-Based Observations and Images Obtained during the Deep Space 1 (DS1) Flyby. Icarus, 153 (1), pp. 16-23.

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Abstract

Image data from the DS1 encounter with Asteroid 9969 Braille and data from a coordinated ground-based photometric observing campaign are combined to study the physical properties of this small Mars crosser. From telescope data the object's brightness was found to vary by up to 0.5 mag from night to night, with the most probable synodic rotational period being 226.4+/-1.3 h (9.4 days) and a mean lightcurve magnitude R(1, ±=24°) =17.04+/-0.10. During the flyby of the spacecraft, two frame images from a range of approximately 13,500 km and phase angle 82.4°, which impose strong constraints on size, shape, and albedo of the object, were obtained. Using telescope and flyby data in combination, the asteroid is estimated to have a size of 2.1×1×1 km3 and shown to have photometric properties similar to the asteroid 4 Vesta, notably a comparably high albedo. The high albedo supports the notion (L. Soderblom et al. 1999, Bull. Am. Astron. Soc. 31,) that Braille is of the V or Q taxonomic type.

Document Type:Article
Additional Information: LIDO-Berichtsjahr=2003,
Title:A Model for Rotation and Shape of Asteroid 9969 Braille from Ground-Based Observations and Images Obtained during the Deep Space 1 (DS1) Flyby
Authors:
AuthorsInstitution or Email of Authors
Oberst, J.UNSPECIFIED
Mottola, S.UNSPECIFIED
Martino, S. diOsservatorio di Torino, Torino, Italy
Hicks, M.Jet Propulsion Laboratory, Pasadena, California
Buratti, B.Jet Propulsion Laboratory, Pasadena, California
Soderblom, L.United States Geological Survey, Flagstaff, Arizona
Thomas, N.Max-Planck-Institute for Aeronomy, Katlenburg-Lindau, Germany
Date:2001
Journal or Publication Title:Icarus
Refereed publication:Yes
In ISI Web of Science:Yes
Volume:153
Page Range:pp. 16-23
Status:Published
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EW - Erforschung des Weltraums
DLR - Research area:Space
DLR - Program:W EW - Erforschung des Weltraums
DLR - Research theme (Project):UNSPECIFIED
Location: Berlin-Adlershof
Institutes and Institutions:Institut für Weltraumsensorik und Planetenerkundung
Deposited By: Susanne Pieth
Deposited On:16 Sep 2005
Last Modified:14 Jan 2010 19:30

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