Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...252..402c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 252, no. 1, Dec. 1991, p. 402-409.
Astronomy and Astrophysics
Astrophysics
20
Mars Satellites, Planet Ephemerides, Astrometry, Astronomical Photography, Charge Coupled Devices
Scientific paper
An analysis of 813 intersatellite observations made with an antiblooming CCD target in 1988 during the opposition of Mars with the sun is presented. The observations were performed with an antiblooming CCD target allowing the presence of the satellites and the planet on a frame simultaneously. Advantages of the CCD technique are that numerous frames may be recorded and the antiblooming system easily solves the problem of the presence of a close bright primary. Details are given on the procedure used for measuring the images and on the reduction performed; the small size of the field did not allow the use of reference stars. The accuracy of the observations is tested by comparison with the new ephemerides ESAPHO and ESADEI. The rms of these observations is about 0.15 arcsecond. A study of the method's shortcomings is presented.
Arlot Jean-Eudes
Colas Francois
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