Contenuti
Immagini
Carica la tua immagine
DSS Images Other Images
Articoli relazionati
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.
|
Sottometti un nuovo articolo
Link relazionati
Sottometti un nuovo link
Membro dei seguenti gruppi:
|
Osservazione e dati astrometrici
| Costellazione: | Ercole |
| Ascensione retta: | 18h04m33.91s |
| Declinazione: | +21°44'22.5" |
| Magnitudine apparente: | 8.716 |
| Distanza: | 769.231 parsec |
| Moto proprio RA: | -12.4 |
| Moto proprio Dec: | 4.8 |
| B-T magnitude: | 10.381 |
| V-T magnitude: | 8.854 |
Cataloghi e designazioni:
|
