Contents
Images
Upload your image
DSS Images Other Images
Related articles
Observations of Double Stars. XVIII.
Micrometer observations of 1350 pairs in 1995-1997 are listed.
| 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.
|
Submit a new article
Related links
Submit a new link
Member of following groups:
|
Observation and Astrometry data
| Constellation: | Hercule |
| Right ascension: | 18h00m24.40s |
| Declination: | +21°11'36.2" |
| Apparent magnitude: | 10.556 |
| Proper motion RA: | -8.1 |
| Proper motion Dec: | -5.6 |
| B-T magnitude: | 11.097 |
| V-T magnitude: | 10.601 |
Catalogs and designations:
|
