Determination of precise photographic positions with the automatic measuring machine IRIS

Details Determination of precise photographic positions with the automatic measuring machine IRIS Determination of precise photographic positions with the automatic measuring machine IRIS

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982ncgb.conf..287h&link_type=abstract

IN: Workshop on the Need for Coordinated Ground-Based Observations of Halley's Comet, Paris, France, April 29, 30, 1982, Proceed

Astronomy and Astrophysics

Astronomy

1

Asteroids, Astrometry, Astronomical Photography, Comets, Photographic Measurement, Position (Location), Computer Programs, Ephemerides, Microdensitometers, Servocontrol

Scientific paper

An important task in astrometry is related to the determination of precise photographic positions of solar system bodies. Positions of newly discovered objects provide a basis for the determination of orbits and the calculations for follow-up observations. A program for the determination of accurate positions of asteroids makes use of an automatic measuring machine IRIS and the interactive computer routine Asteroid, which allows automatized measurements and reductions of photographic positions. The Image Reading Instrument System (IRIS) was developed in the 1970s. IRIS represents a two-channel microdensitometer with vibrating prisms as scanning devices. A description of the interactive computer routine Asteroid is presented, taking into account the selection of bright stars, aspects of visual identification, coordinate transformation, the selection of reference stars, the identification of the unknown objects, automatic measurements, and details of data reduction.

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