J/A+A/575/A73 Astrometry of the Saturnian satellites 2004-12 (Tajeddine+, 2015)
Cassini ISS astrometry of the Saturnian satellites:
Tethys, Dione, Rhea, Iapetus, and Phoebe 2004-2012.
Tajeddine R., Lainey V., Cooper N.J., Murray C.D.
<Astron. Astrophys. 575, A73 (2015)>
=2015A&A...575A..73T 2015A&A...575A..73T
ADC_Keywords: Positional data ; Solar system
Keywords: astrometry - planets and satellites: individual: Tethys -
planets and satellites: individual: Dione -
planets and satellites: individual: Rhea -
planets and satellites: individual: Iapetus -
planets and satellites: individual: Phoebe
Abstract:
The Cassini spacecraft has been orbiting Saturn since 2004 returning
images of satellites with astrometric resolution as high as few
hundreds of meters.
The images that were taken by the Narrow Angle Camera (NAC) of Image
Science Subsystem (ISS) instrument on board Cassini, were used in this
work for the purpose of astrometry.
We applied the same method that was previously developed to reduce
Cassini NAC images of Mimas and Enceladus.
We provide 5240 astrometric positions in right ascension and
declination of the satellites: Tethys, Dione, Rhea, Iapetus, and
Phoebe, using images that were taken by Cassini NAC between 2004 and
2012. Mean residuals compared to the JPL ephemeris SAT365 are of the
order of hundreds of meters with standard deviations of the order of
few kilometers. Frequency analysis of the residuals shows the
remaining non-modeled effects of satellites on others.
Description:
This file contains 5240 astrometric positions obtained from the ISS
NAC instrument on board of Cassini spacecraft of the satellites
Tethys, Dione, Rhea, Iapetus and Phoebe for the time span 2004-2012.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 144 5463 Astrometric positions of the Saturn's satellites
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See also:
J/A+AS/139/47 : 1995 Saturnian satellites mutual events (Emelianov+, 1999)
J/A+A/380/727 : 1995 Saturnian satellite observations (Vienne+, 2001)
J/A+A/383/296 : Saturnian Satellites positions (1996-2000) (Peng+, 2002)
J/A+A/400/1095 : 1995-99 CCD observation of Saturnian satellite (Veiga+, 2003)
J/other/SoSyR/45.523 : Saturnian satellites CCD observations (Grosheva+, 2011)
J/A+A/544/A29 : 2009 Saturnian satellites mutual events (Arlot+, 2012)
J/A+A/551/A129 : Mimas and Enceladus Cassini ISS astrometry (Tajeddine+ 2013)
J/A+A/572/A43 : Saturnian satellites Cassini ISS astrometry (Cooper+, 2014)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Image Image name
15- 25 A11 "Y-M-D" ObsDate Calendar observation date (YYYY MMM DD)
27- 38 A12 "h:m:s" ObsTime Time (UTC) (hh:mm:ss.sss)
41- 49 A9 --- Object Observed body: IAPETUS, DIONE, RHEA, TETHYS,
or PHOEBE
51- 60 F10.6 deg RAdeg Satellite's Right Ascension (ICRF)
62- 71 F10.6 deg DEdeg Satellite's Declination (ICRF)
73- 81 E9.3 deg e_RAdeg Uncertainty in RA*cos(DE)
83- 91 E9.3 deg e_DEdeg Uncertainty in DE
93-102 F10.6 deg RAcdeg Camera pointing Right Ascension (ICRF)
104-113 F10.6 deg DEcdeg Camera pointing Declination (ICRF)
116-125 F10.6 deg Twist [0/360] Camera's twist angle
127-133 F7.2 pix Sample [85/780] Satellite's sample position on image
135-141 F7.2 pix line [87/915] Satellite's line position on image
143-144 I2 --- stars [1/84] Number of stars in image
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Acknowledgements:
Radwan Tajeddine, tajeddine(at)astro.cornell.edu
(End) Radwan Tajeddine [Cornell, USA], Patricia Vannier [CDS] 22-Jan-2015