Universität zu Köln

Paetzold, M., Andert, T. P., Tyler, G. L., Asmar, S. W., Haeusler, B. and Tellmann, S. (2014). Phobos mass determination from the very close flyby of Mars Express in 2010. Icarus, 229. S. 92 - 99. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1090-2643

Full text not available from this repository.

Abstract

The global geophysical parameters GM(Ph) = (0.7072 +/- 0.0013) x 10(-3) km(3) S-2, C-20, C-22 and the bulk density <rho > = (1862 +/- 30) kg/m(3) have been determined from the closest Mars Express flyby at the Mars moon Phobos on 3rd March 2010 at a distance of 77 km. The second degree gravity field of Phobos (C-20, C-22) could not be solved for at sufficient accuracy. The low bulk density suggests a high porosity and an inhomogeneous mass distribution but the large errors of C-20 and C-22 are still consistent with a homogeneous as well as an inhomogeneous mass distribution. The modeling of the moon's interior by a randomly selected mass distribution of given porosity and water ice content but constrained by the observed GM(Ph) and <rho > let a simulated C-20 decrease with increasing porosity and water ice content indicating an increasingly inhomogeneous mass distribution. The high porosity together with an inhomogeneous mass distribution would be evidence that Phobos accreted in orbit about Mars from a debris disk and is not a captured asteroid. (C) 2013 Elsevier Inc. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Paetzold, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Andert, T. P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tyler, G. L. UNSPECIFIED UNSPECIFIED UNSPECIFIED Asmar, S. W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haeusler, B. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tellmann, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-447258
DOI:	10.1016/j.icarus.2013.10.021
Journal or Publication Title:	Icarus
Volume:	229
Page Range:	S. 92 - 99
Date:	2014
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1090-2643
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language ASTEROID 21 LUTETIA; SATELLITES; GRAVITY; MODEL Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/44725