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UvbyHbeta_ photometry of main sequence A type stars.
We present Stroemgren uvby and Hbeta_ photometry for a set of575 northern main sequence A type stars, most of them belonging to theHipparcos Input Catalogue, with V from 5mag to 10mag and with knownradial velocities. These observations enlarge the catalogue we began tocompile some years ago to more than 1500 stars. Our catalogue includeskinematic and astrophysical data for each star. Our future goal is toperform an accurate analysis of the kinematical behaviour of these starsin the solar neighbourhood.
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| Polarization measurements of 313 nearby stars
The linear polarization of 313 low galactic latitude stars has beenmeasured. With few exceptions all program stars have a spectral typelater than B9 and are within 600 parsec of the sun. 181 stars aresituated at the southern sky and 132 at the northern sky.
| Absolute Emission-Line Intensities in Planetary Nebulae. I.
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Datos observacionales y astrométricos
| Constelación: | Cisne |
| Ascensión Recta: | 21h39m24.97s |
| Declinación: | +40°38'13.6" |
| Magnitud Aparente: | 8.058 |
| Distancia: | 854.701 parsecs |
| Movimiento Propio en Ascensión Recta: | 2.3 |
| Movimiento Propio en Declinación: | -0.9 |
| B-T magnitude: | 8.073 |
| V-T magnitude: | 8.06 |
Catálogos y designaciones:
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