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UBV photometry of stars whose positions are accurately known. VI
Results are presented from UBV photometric observations of 1000 stars ofthe Bright Star Catalogue and the faint extension of the FK5.Observations were carried out between July 1987 and December 1990 withthe 40-cm Cassegrain telescope of the Kvistaberg Observatory.
| Fifth fundamental catalogue. Part 2: The FK5 extension - new fundamental stars
The mean positions and proper motions for 3117 new fundamental starsessentially in the magnitude range about 4.5 to 9.5 are given in thisFK5 extension. Mean apparent visual magnitude is 7.2 and is on average2.5 magnitudes fainter then the basic FK5 which has a mean magnitude of4.7. (The basic FK5 gives the mean positions and proper motions for theclassical 1535 fundamental stars). The following are discussed: theobservational material, reduction of observations, star selection, andthe system for the FK5 extension. An explanation and description of thecatalog are given. The catalog of 3117 fundamental stars for the equinoxand epoch J2000.0 and B1950.0 is presented. The parallaxes and radialvelocities for 22 extension stars with large forecasting effects aregiven. Catalogs used in the compilation of the FK5 fundamental catalogare listed.
| A photoelectric study of the eclipsing binary system KO Aql.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1979PASJ...31..271H&db_key=AST
| The proper motions of Struve double stars
The proper motions of the components of 103 Struve double stars fromMuller's list of neglected stars and of 15 other systems were measuredrelative to sets of reference stars, for the primary purpose ofdistinguishing physical from optical pairs. A by-product of thisinvestigation is a list of measured position angles and distances ofthese objects, at two epochs each.
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Osservazione e dati astrometrici
| Costellazione: | Aquila |
| Ascensione retta: | 18h48m13.82s |
| Declinazione: | +10°38'33.9" |
| Magnitudine apparente: | 8.163 |
| Distanza: | 740.741 parsec |
| Moto proprio RA: | -3.2 |
| Moto proprio Dec: | 5.9 |
| B-T magnitude: | 9.481 |
| V-T magnitude: | 8.272 |
Cataloghi e designazioni:
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