Digital centering algorithms for the sun, moon, and planets

Details Digital centering algorithms for the sun, moon, and planets Digital centering algorithms for the sun, moon, and planets

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990aj.....99..424s&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 99, Jan. 1990, p. 424-430.

Astronomy and Astrophysics

Astronomy

1

Astrometry, Lunar Limb, Planetary Surfaces, Reference Stars, Solar Limb, Solar Orbits, Algorithms, Astronomical Photography, Digital Techniques, Image Processing, Inertial Coordinates, Position (Location), Solar System, Planets, Moon, Techniques, Computer Methods, Diagrams, Position (Location), Dynamics, Mercury (Planet), Uranus, Neptune, Mars, Saturn, Procedure, Calculations, Venus, Jupiter, Image Processing, Astronomy

Scientific paper

Algorithms for centering the planets, sun, and moon are presented. Three different digital centering routines (center of light, direct, and iterative functional fits) are given for the planets and an additional one for finding the extreme limb points of solar and lunar observations. Differing planetary routines are needed because some planets can show large variations in apparent size, surface detail, and phase at times. A method for defining the edge of digital planetary images and a discussion of the use of these algorithms in the current USNO southern IRS program are also given.

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