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Derivation of angular diameters of stars from lunar occultations
A description is presented of the results obtained in the photoelectricobservations of occultations involving four stars. The considered starsinclude Eta Gem (ZC 946), Mu Gem (ZC 976), 187 B. Gem (ZC 1161), and 31Leo (ZC 1486). The theoretical principles of the studies are considered,taking into account point source occultations, the stellar diameter andthe influence of telescope aperture, and spectral effects. Observationaldata concerning the considered stars are presented in a table and anumber of graphs. It is pointed out that Mu Gem is a triple system.However, on account of their distances and their weakness the companionscannot affect the observed intensity curve. A combination of the deriveddiameter with the trigonometric parallax reported by Jenkins (1963)provides for the linear diameter of Mu Gem the result of 91 plus orminus 28 solar diameters.
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Observation and Astrometry data
| Constellation: | Capricornus |
| Right ascension: | 21h25m10.47s |
| Declination: | -16°24'07.7" |
| Apparent magnitude: | 9.339 |
| Proper motion RA: | -23 |
| Proper motion Dec: | -1.7 |
| B-T magnitude: | 9.601 |
| V-T magnitude: | 9.361 |
Catalogs and designations:
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