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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
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| H-beta photometry of northern intermediate galactic latitude early-type stars and galactic structure away from the plane
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Osservazione e dati astrometrici
| Costellazione: | Cefeo |
| Ascensione retta: | 20h47m31.69s |
| Declinazione: | +55°53'05.7" |
| Magnitudine apparente: | 9.352 |
| Moto proprio RA: | -2.3 |
| Moto proprio Dec: | -5.8 |
| B-T magnitude: | 9.729 |
| V-T magnitude: | 9.384 |
Cataloghi e designazioni:
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