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The Seven-Inch Transit Circle and its New Zealand Program

Published online by Cambridge University Press:  04 August 2017

J. A. Hughes ,
M. D. Robinson ,
F. S. Gauss  and
R. C. Stone
J. A. Hughes
Affiliation:
U. S. Naval Observatory
M. D. Robinson
Affiliation:
U. S. Naval Observatory
F. S. Gauss
Affiliation:
U. S. Naval Observatory
R. C. Stone
Affiliation:
U. S. Naval Observatory

Extract

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The modernization of the seven-inch transit circle is an important aspect of the envisioned Naval Observatory observing effort. This task has been carried out on the basis of the following desiderata:

1) The basic sensor should be photoelectric

2) Point sources observable at night down to at least m=10

3) Venus, Mercury and stars down to m=4 observable in the daytime

4) Mars, Jupiter, Saturn, Uranus, Neptune and the Moon observable

5) The Sun must be observable

6) The instrumental parameters: azimuth, level, collimation, nadir, and so on must be determined so as to allow absolute observations

7) The system should operate essentially autonomously, but an observer should be kept in the observing “loop”.

It appears that all of these objectives have been achieved by the system now to be briefly described.

Type
VI. Transit Circles and Astrolabes
Information
Symposium - International Astronomical Union , Volume 109: Astrometric Techniques , 1986 , pp. 483 - 496
Copyright
Copyright © Reidel 1986