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The Tokyo PMC catalog 90-93: Catalog of positions of 6649 stars observed in 1990 through 1993 with Tokyo photoelectric meridian circle
The sixth annual catalog of the Tokyo Photoelectric Meridian Circle(PMC) is presented for 6649 stars which were observed at least two timesin January 1990 through March 1993. The mean positions of the starsobserved are given in the catalog at the corresponding mean epochs ofobservations of individual stars. The coordinates of the catalog arebased on the FK5 system, and referred to the equinox and equator ofJ2000.0. The mean local deviations of the observed positions from theFK5 catalog positions are constructed for the basic FK5 stars to comparewith those of the Tokyo PMC Catalog 89 and preliminary Hipparcos resultsof H30.
| Occultations by possible material in Saturn's outer magnetosphere. II
Results of a search for occultations of stars in the SAO catalog bySaturn's outer magnetosphere during 1989-1990 are presented. A total ofnine events are predicted to occur during this period. The mostfavorable event will be the occultation of 28 Sgr (SAO 187255) duringJuly 2, 3, 1989. Occultations of SAO 187036, SAO 188348 and SAO 188120occur near opposition and, therefore, can be observed over a widelongitude range.
| Estimation of spectral classifications for bright southern stars with interesting Stromgren indices
This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.
| Photoelectric measurements of lunar occultation. VI. Further observational results.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973AJ.....78..482D&db_key=AST
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Pozíciós és asztrometriai adatok
| Csillagkép: | Nyilas |
| Rektaszcenzió: | 19h47m59.98s |
| Deklináció: | -20°57'27.3" |
| Vizuális fényesség: | 6.681 |
| Távolság: | 221.239 parszek |
| RA sajátmozgás: | 5 |
| Dec sajátmozgás: | -1.4 |
| B-T magnitude: | 7.769 |
| V-T magnitude: | 6.771 |
Katalógusok és elnevezések:
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