The mean rotation rate of Venus from 29 years of Earth-based radar observations

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dc.contributor.authorCampbell, Bruce A.
dc.contributor.authorCampbell, Donald B.
dc.contributor.authorCarter, Lynn M.
dc.contributor.authorChandler, John F.
dc.contributor.authorGiorgini, Jon D.
dc.contributor.authorMargot, Jean-Luc
dc.contributor.authorMorgang, Gareth A.
dc.contributor.authorNolan, Michael C.
dc.contributor.authorPerillat, Phillip J.
dc.contributor.authorWhitten, Jennifer L.
dc.date.accessioned2019-08-23T02:01:00Z
dc.date.available2019-08-23T02:01:00Z
dc.date.issued2019
dc.description.abstractWe measured the length of the Venus sidereal day (LOD) from Earth-based radar observations collected from 1988 to 2017, using offsets in surface feature longitudes from a prediction based on a 243.0185d period derived from analysis of Magellan mission images over a 487-day interval. We derive a mean LOD over 29 years of 243.0212 +/- 0.0006d. Our result is consistent with earlier estimates (but with smaller uncertainties), including those based on offsets between Venus Express infrared mapping data and Magellan topography that suggest a mean LOD of 243.0228 +/- 0.002d over a 16-year interval. We cannot detect subtle, short-term oscillations in rate, but the derived value provides an excellent fit to observational data over a 29-year period that can be used for future landing-site planning.
dc.format.extent19–23
dc.identifier0019-1035
dc.identifier.citationCampbell, Bruce A., Campbell, Donald B., Carter, Lynn M., Chandler, John F., Giorgini, Jon D., Margot, Jean-Luc, Morgang, Gareth A., Nolan, Michael C., Perillat, Phillip J., and Whitten, Jennifer L. 2019. "<a href="https://repository.si.edu/handle/10088/98622">The mean rotation rate of Venus from 29 years of Earth-based radar observations</a>." <em>Icarus</em>, 332 19–23. <a href="https://doi.org/10.1016/j.icarus.2019.06.019">https://doi.org/10.1016/j.icarus.2019.06.019</a>.
dc.identifier.issn0019-1035
dc.identifier.urihttps://hdl.handle.net/10088/98622
dc.publisherAcademic Press Incorporated Elsevier Science
dc.relation.ispartofIcarus 332
dc.titleThe mean rotation rate of Venus from 29 years of Earth-based radar observations
dc.typearticle
sro.description.unitNASM
sro.description.unitNASM-CEPS
sro.description.unitSAO
sro.identifier.doi10.1016/j.icarus.2019.06.019
sro.identifier.itemID152082
sro.identifier.refworksID32679
sro.identifier.urlhttps://repository.si.edu/handle/10088/98622
sro.publicationPlaceSan Diego, California

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