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The Oscillating Slit Micrometer of the Meridian Circle PMC 190 Tokyo
Published online by Cambridge University Press: 04 August 2017
Abstract
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The meridian circle installed at the Tokyo Astronomical Observatory in 1982/83 is equipped with a photoelectric Double Slit Micrometer which is one of the basic prerequisites for fully automatic observation. A slit plate is located in the image field of the telescope. It oscillates parallel to right ascension while being guided at the mean traveling speed of the star.
The paper describes the procedure by which the moment of the star passage through the instrument's meridian and declination is determined. Furthermore, the autocollimation devices are described which are an essential prerequisite for the determination and periodical checking of the instrumental errors.
Also, the measuring devices for the passage of the sun and the moon are dealt with briefly.
- Type
- V. Small Field Photoelectric Astrometry
- Information
- Symposium - International Astronomical Union , Volume 109: Astrometric Techniques , 1986 , pp. 379 - 388
- Copyright
- Copyright © Reidel 1986
References
Literature
Kühne, C.
1983, A new automatic meridian circle PMC 190, Astron. Astrophys.
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Høg, E., 1970, A Theory of a Photoelectric Micrometer Astron. Astrophys.
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Yoshizawa, M., Yasuda, GH.
1982, Pinhole System for Solar and Lunar Observations, Annals of the Tokyo Astronomical Observatory, 2. Series, Vo. XIII, No. 4
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