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The micrometers of the Carlsberg Automatic Meridian Circle

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Abstract

A new moving slit star micrometer has been developed for the 18 cm Carlsberg Automatic Meridian Circle on La Palma. A zenith mean error of 0 inf. sup 15 for one transit and a limiting magnitude of 14 inf. supm 8 is obtained. It has a high efficiency and is well suited for improving the FK5 system and extending it to much fainter stars. A new collimator alignment micrometer and the necessary calibrations are also described.

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Helmer, L., Fabricius, C. & Morrison, L.V. The micrometers of the Carlsberg Automatic Meridian Circle. Exp Astron 2, 85–99 (1991). https://doi.org/10.1007/BF00576322

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Keywords

  • Meridian Circle
  • Faint Star
  • Collimator Alignment