Photovisual magnitude differences of double stars
Copyright policy ) K. Aa. Strand;
Photovisual magnitude differences of double stars
AbstractDifferences in magnitudes between the components of 874 double stars have been derived from visual estimates on several series of multi-exposure photographic plates. The plates were obtained with long focus refractors primarily for the purpose of determining the relative positions of double stars according to the well-known Hertzsprung method.
- U.S. Naval Observatory Flagstaff Station United States
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