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New Estimates of the Solar-Neighborhood Massive Star Birthrate and the Galactic Supernova Rate
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| Catalog of Galactic OB Stars
An all-sky catalog of Galactic OB stars has been created by extendingthe Case-Hamburg Galactic plane luminous-stars surveys to include 5500additional objects drawn from the literature. This work brings the totalnumber of known or reasonably suspected OB stars to over 16,000.Companion databases of UBVβ photometry and MK classifications forthese objects include nearly 30,000 and 20,000 entries, respectively.
| UBV beta Database for Case-Hamburg Northern and Southern Luminous Stars
A database of photoelectric UBV beta photometry for stars listed in theCase-Hamburg northern and southern Milky Way luminous stars surveys hasbeen compiled from the original research literature. Consisting of over16,000 observations of some 7300 stars from over 500 sources, thisdatabase constitutes the most complete compilation of such photometryavailable for intrinsically luminous stars around the Galactic plane.Over 5000 stars listed in the Case-Hamburg surveys still lackfundamental photometric data.
| Interstellar dust and distances to planetary nebulae.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1973ApJ...181..135L&db_key=AST
| UBV and Hgamma observations of early-type field stars
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972AJ.....77..376L&db_key=AST
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Osservazione e dati astrometrici
| Costellazione: | Aquila |
| Ascensione retta: | 19h00m46.60s |
| Declinazione: | +00°23'49.8" |
| Magnitudine apparente: | 10.008 |
| Moto proprio RA: | -0.9 |
| Moto proprio Dec: | -2.7 |
| B-T magnitude: | 10.811 |
| V-T magnitude: | 10.075 |
Cataloghi e designazioni:
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