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Enviar un nuevo artículo| Micrometer Measures of Double Stars Micrometer measures of 795 double stars made with the 26 inch (0.66 m)refractor of the US Naval Observatory from 1984 to 1990 are presented.
 
 
 |  | Visual multiples. VII - MK classifications Classifications are given for 865 components of visual multiples; theyshow no systematic differences from the MK system, and the random errorsare one subclass in type and two-thirds of a luminosity class. It isfound that at least 1% of the F-type IV and V stars are weak-lined, 32%of the A4-F1 IV and V stars are Am, and 5% of the A0-A3 IV and V starsare early-type Am. Attention is called to the large fraction (55%) ofthe A3-A9 III-V stars that are of luminosity classes III or IV, unlikethe percentage (16%) at neighboring types.
 
 
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 Datos observacionales y astrométricos
| Constelación: | Leo |  | Ascensión Recta: | 11h36m14.61s |  | Declinación: | +03°18'04.0" |  | Magnitud Aparente: | 7.196 |  | Distancia: | 215.517 parsecs |  | Movimiento Propio en Ascensión Recta: | -32.2 |  | Movimiento Propio en Declinación: | -39.7 |  | B-T magnitude: | 8.381 |  | V-T magnitude: | 7.294 |  Catálogos y designaciones:
 
 
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