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Rotation period of Venus estimated from Venus Express VIRTIS images and Magellan altimetry

Müller, Nils and Helbert, Jörn and Erard, S. and Piccioni, G. and Drossart, P. (2012) Rotation period of Venus estimated from Venus Express VIRTIS images and Magellan altimetry. Icarus: International Journal of Solar System Studies, 217 (2), pp. 474-483. Elsevier. DOI: 10.1016/j.icarus.2011.09.026 ISSN 0019-1035

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Official URL: http://www.sciencedirect.com/science/article/pii/S0019103511003782

Abstract

The 1.02 micron wavelength thermal emission of the nightside of Venus is strongly anti-correlated to the elevation of the surface. The VIRTIS instrument on Venus Express has mapped this emission and therefore gives evidence for the orientation of Venus between 2006 and 2008. The Magellan mission provided a global altimetry data set recorded between 1990 and 1992. Comparison of these two data sets reveals a deviation in longitude indicating that the rotation of the planet is not fully described by the orientation model recommended by the IAU. This deviation is sufficiently large to affect estimates of surface emissivity from infrared imaging. A revised period of rotation of Venus of 243.023 ± 0.002 d aligns the two data sets. This period of rotation agrees with pre-Magellan estimates but is significantly different from the commonly accepted value of 243.0185 ± 0.0001 d estimated from Magellan radar images. It is possible that this discrepancy stems from a length of day variation with the value of 243.023 ± 0.002 d representing the average of the rotation period over 16 years.

Item URL in elib:https://elib.dlr.de/78843/
Document Type:Article
Title:Rotation period of Venus estimated from Venus Express VIRTIS images and Magellan altimetry
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Müller, NilsNils.Mueller (at) dlr.deUNSPECIFIED
Helbert, JörnJoern.Helbert (at) dlr.dehttps://orcid.org/0000-0001-5346-9505
Erard, S.LESIA, Observatoire de Paris, FranceUNSPECIFIED
Piccioni, G.IASF-INAF, Rome, ItalyUNSPECIFIED
Drossart, P.LESIA, Observatoire de Paris, FranceUNSPECIFIED
Date:February 2012
Journal or Publication Title:Icarus: International Journal of Solar System Studies
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:217
DOI :10.1016/j.icarus.2011.09.026
Page Range:pp. 474-483
Publisher:Elsevier
ISSN:0019-1035
Status:Published
Keywords:Venus, Tagesdauer, Variationen der Tagesdauer
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Science and Exploration
DLR - Research area:Raumfahrt
DLR - Program:R EW - Erforschung des Weltraums
DLR - Research theme (Project):R - Vorhaben Venus Express Kamera (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Experimentelle Planetenphysik
Deposited By: Müller, Nils
Deposited On:03 Dec 2012 15:21
Last Modified:31 Jul 2019 19:38

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