J/A+A/572/A104 Astrometric obs. of Phobos and Deimos in 1971 (Robert+, 2014)
Astrometric observations of Phobos and Deimos during the 1971 opposition of Mars
Robert V., Lainey V., Pascu D., Arlot J.-E., De Cuyper J.-P., Dehant V.,
Thuillot W.
<Astron. Astrophys. 572, A104 (2014)>
=2014A&A...572A.104R 2014A&A...572A.104R
ADC_Keywords: Planets ; Positional data
Keywords: astrometry - ephemerides - planets and satellites: individual: Mars -
planets and satellites: individual: Phobos -
planets and satellites: individual: Deimos
Abstract:
Accurate positional measurements of planets and satellites are used to
improve our knowledge of their dynamics and to infer the accuracy of
planet and satellite ephemerides. In the framework of the FP7 ESPaCE
project, we provide positions of Mars, Phobos and Deimos taken with
the U.S. Naval Observatory 26-inch refractor during the 1971
opposition of the planet. These plates were measured with the
digitizer of the Royal Observatory of Belgium and reduced through an
optimal process that includes image, instrumental and spherical
corrections to provide the most accurate data.
Description:
Astrometric data of Mars, Phobos and Deimos taken with the U.S. Naval
Observatory 26-inch refractor during the 1971 opposition of the
planet. Geocentric observed positions referred to the ICRF and
corrected for all spherical effects except for the light time
propagation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
mars71.dat 42 73 USNO astrometric data of Mars (1971)
phobos71.dat 42 71 USNO astrometric data of Phobos (1971)
deimos71.dat 42 51 USNO astrometric data of Deimos (1971)
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See also:
J/A+A/545/A144 : Astrometric observations of Deimos (Pasewaldt+, 2012)
J/A+A/487/755 : CCD observations of Martian Satellites (Veiga+, 2008)
J/A+A/488/361 : Mars Express astrometric obs. of Phobos (Willner+, 2008)
Byte-by-byte Description of file: mars71.dat phobos71.dat deimos71.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d JD [2441170/2441200] Julian Day of observation (TDB)
15- 16 A2 --- --- [/]
17- 28 F12.6 deg RAdeg Geocentric right Ascension (ICRF)
29- 30 A2 --- --- [/]
31- 42 F12.6 deg DEdeg Geocentric declination (ICRF)
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Acknowledgements:
The research leading to these results has received fundings from the
European Community's Seventh Framework Programme (FP7/2007-2013) under
grant agreement 263466 for the FP7-ESPaCE program.
Author's address:
Vincent Robert, robert(at)imcce.fr
(End) Vincent Robert [IPSA & IMCCE], Patricia Vannier [CDS] 08-Sep-2014