Contenidos
Imágenes
Subir su imagen
DSS Images Other Images
Artículos relacionados
Monitoring of spotted RS CVn and BY Dra type stars. I. Simultaneous optical and infrared photometry UBV(RI)cJHK photometry of 6 active stars, collected at theSouth African Astronomical Observatory in 1996 and 1997, is presented.The light and colour curves, which are compared with those observed atprevious epochs, show significant variation in their wave-likemodulation and in their maximum brightness.
| The Henry Draper Extension Charts: A catalogue of accurate positions, proper motions, magnitudes and spectral types of 86933 stars The Henry Draper Extension Charts (HDEC), published in the form offinding charts, provide spectral classification for some 87000 starsmostly between 10th and 11th magnitude. This data, being highlyvaluable, as yet was practically unusable for modern computer-basedastronomy. An earlier pilot project (Roeser et al. 1991) demonstrated apossibility to convert this into a star catalogue, using measurements ofcartesian coordinates of stars on the charts and positions of theAstrographic Catalogue (AC) for subsequent identification. We presenthere a final HDEC catalogue comprising accurate positions, propermotions, magnitudes and spectral classes for 86933 stars of the HenryDraper Extension Charts.
|
Enviar un nuevo artículo
Enlaces relacionados
- - No se han encontrado enlaces -
En viar un nuevo enlace
Miembro de los siguientes grupos:
|
Datos observacionales y astrométricos
Constelación: | Orión |
Ascensión Recta: | 05h08m48.82s |
Declinación: | +02°07'32.0" |
Magnitud Aparente: | 10.116 |
Movimiento Propio en Ascensión Recta: | -0.4 |
Movimiento Propio en Declinación: | 5.4 |
B-T magnitude: | 11.932 |
V-T magnitude: | 10.266 |
Catálogos y designaciones:
|