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Astrometric Reduction of Cassini ISS Images of Enceladus in 2015 Based on Gaia DR1

Published online by Cambridge University Press:  07 March 2018

Q. F. Zhang ,
V. Lainey ,
A. Vienne ,
N. J. Cooper ,
Q. Y. Peng  and
N. Wang
Q. F. Zhang*
Affiliation:
Department of Computer Science, Jinan University, Guangzhou 510632, P.R. China
V. Lainey
Affiliation:
IMCCE, Observatoire de Paris, UMR 8028 du CNRS, UPMC, Université de Lille 1, 77 av. Denfert-Rochereau, 75014 Paris, France
A. Vienne
Affiliation:
IMCCE, Observatoire de Paris, UMR 8028 du CNRS, UPMC, Université de Lille 1, 77 av. Denfert-Rochereau, 75014 Paris, France
N. J. Cooper
Affiliation:
Astronomy Unit, School of Mathematical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, UK
Q. Y. Peng
Affiliation:
Department of Computer Science, Jinan University, Guangzhou 510632, P.R. China
N. Wang
Affiliation:
Department of Computer Science, Jinan University, Guangzhou 510632, P.R. China
*
*email: [email protected]
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Abstract

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The Gaia DR1 catalogue stars are taken as reference ones to reduce the Cassini ISS images of Enceladus in 2015, and a total of 494 Cassini-centered astrometric observation are obtained in right ascension(α) and declination (δ) in the international Celestial Reference Frame(ICRF). Compared with JPL ephemerides SAT367, we derive that their mean residuals are a few tens meters in α*cos(δ) and a few kilometers in δ, and their standard deviation is not over 2 kilometers. Compared with the results from UCAC4 catalogue stars, The Gaia DR1 has the equivalent precision of reduction.

Keywords

Astrometric ReductionEnceladusGaia DR1Cassini ISS
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S330: Astrometry and Astrophysics in the Gaia sky , April 2017 , pp. 411 - 412
Copyright
Copyright © International Astronomical Union 2018 

References

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