Authors: Willner K., Oberst J., Hussmann H., Giese B., Hoffmann H., Matz K.-D., Roatsch T., and Duxbury T.
Year: 2010
Title: Phobos control point network, rotation, and shape
Journal: Earth and Planetary Science Letters
Volume: 294
Number: 3-4
Pages: 541-546
Keywords: Mars, major, planetology, theory, observation, position, data, rotation, analytical, numerical
Abstract: A new independent control point network for Phobos was computed from image data obtained by the SRC (Super Resolution Channel) on board the European Mars Express Mission. The network solution includes 3D coordinates of 665 surface control points and was used to observe the forced libration amplitude of Phobos. Based on the network control points a spherical harmonic function model to degree and order 17 was derived, from which volume, bulk density and moments of inertia were computed. The modeled forced libration amplitude agrees to our observation within the error bands, indicating a homogeneous mass distribution for Phobos. To bring both values into exact agreement with the observations, different mass distribution models were applied. It appears that the amplitude is relatively insensitive to a simple two-layer density model.
%F: AA(German Aerospace Center, Institute of Planetary Research, Rutherfordsta?e 2, 12489 Berlin, Germany; Technische Universitat Berlin, Stra?e des 17. Juni 135, 10623 Berlin, Germany), AB(German Aerospace Center, Institute of Planetary Research, Rutherfordsta?e 2, 12489 Berlin, Germany; Technische Universitat Berlin, Stra?e des 17. Juni 135, 10623 Berlin, Germany), AC(German Aerospace Center, Institute of Planetary Research, Rutherfordsta?e 2, 12489 Berlin, Germany), AD(German Aerospace Center, Institute of Planetary Research, Rutherfordsta?e 2, 12489 Berlin, Germany), AE(German Aerospace Center, Institute of Planetary Research, Rutherfordsta?e 2, 12489 Berlin, Germany), AF(German Aerospace Center, Institute of Planetary Research, Rutherfordsta?e 2, 12489 Berlin, Germany), AG(German Aerospace Center, Institute of Planetary Research, Rutherfordsta?e 2, 12489 Berlin, Germany), AH(George Mason University, 4400 University Drive, Fairfax, VA 22030, United States)
Bibliogaphic Code: 2010E%26PSL.294..541W
Return to previous page