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Some revisions to the Bright Star Catalogue and its supplement
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| Visual measurements of southern double stars
A double-star observing program is described which has been started atCordoba with a 30 cm refractor. Usually neglected Index Catalog ofVisual Double Stars (IDS) pairs south of -60 deg are selected forobservation, most of them having been measured only one or two timespreviously. A total of 174 micrometric observations of 78 wide pairs arepresented together with a few measurements of 9 double stars not foundin the IDS. Also reported is a list of 135 additional measurements of 26test stars. By comparison with all earlier observations, an estimate forthe personal equation has been made, which is applied in combinationwith catalogue proper motions to investigate the nature of many of thesepairs.
| The S201 far-ultraviolet imaging survey. III - A field in Sagittarius
Far-ultraviolet imagery of a 20 deg diameter field in Sagittarius,centered near (1950) R.A. 18 h 34 m, decl. -30 deg 25 arcmin, wasobtained by the S201 far-ultraviolet camera during the Apollo 16mission. In a 10-minute exposure covering the 1250-1600 A wavelengthrange, 1034 star images are detectable, with a limiting ultravioletmagnitude of about 10. Most of these objects are identified withearly-type stars listed in the Smithsonian Astrophysical ObservatoryStar Catalog, the Catalog of Stellar Identifications, or both, but 203objects remain unidentified or are identified with late-type stars. Thephotometric measurements appear to be in reasonable agreement with thoseof the International Ultraviolet Explorer for stars in common, and withexpectations for A0 stars. A detailed photometric study was made of theMessier 8 region, and it is concluded that dust-scattered starlightcontributes about half of the total radiation observed from the centralregion of M8.
| Early-type high-velocity stars in the solar neighborhood. III - Radial velocities, rotation indices, and line-strength indices for southern candidates
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1983AJ.....88.1349S&db_key=AST
| Comparison of proper motions obtained by means of rectilinear trajectories of optical double stars with those given by the SAO catalog
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1979A&A....71...55D&db_key=AST
| Rectilinear trajectories for three visual double stars. IDS 10275S5312, h 4329; IDS 19062S3401 (AB), h 5094 (AB) and IDS 19465S1036 (AB), beta 148 (AB).
Abstract image available at:http://adsabs.harvard.edu/abs/1978A&AS...34..369D
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Osservazione e dati astrometrici
| Costellazione: | Sagittario |
| Ascensione retta: | 19h12m44.12s |
| Declinazione: | -33°50'46.3" |
| Magnitudine apparente: | 7.345 |
| Distanza: | 456.621 parsec |
| Moto proprio RA: | -1.9 |
| Moto proprio Dec: | -6.1 |
| B-T magnitude: | 7.276 |
| V-T magnitude: | 7.34 |
Cataloghi e designazioni:
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