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Organized Observations of Night-Sky Brightness in Japan

Published online by Cambridge University Press:  12 April 2016

Hiroki Kosai  and
Syuzo Isobe
Hiroki Kosai
Affiliation:
National Astronomical Observatory, Mitaka, Tokyo 181, Japan
Syuzo Isobe
Affiliation:
National Astronomical Observatory, Mitaka, Tokyo 181, Japan

Abstract

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Observations of the night-sky brightness were organized at 106 places in Japan by a promotion of the Environmental Agency with the help of many local governments. Two kinds of measurements were carried out: 1) Number of stars were counted in a region of triangle formed by Alpha Lyr, Epsilon Lyr, and Zeta Lyr by at least 10 contributors at each point. 2) Photographs of a star field at the zenith at each point were taken with the same type of camera and film. These results gave us a good idea on distribution of night-sky brightness in Japan.

Type
Light Pollution
Information
International Astronomical Union Colloquium , Volume 112: Light Pollution, Radio Interference, and Space Debris , 1991 , pp. 35 - 44
Copyright
Copyright © Astronomical Society of the Pacific 1991