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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.
| Search for stars with intrinsic polarization
Results of polarimetric observations of 55 late-type stars arepresented. Twenty of these stars were found to have appreciablepolarization. The dependence of the degree of polarization on wavelengthis given. It is considered very probable that the polarizations of thestars SAO 141881, 141898, and 160413 are intrinsic.
| HR Delphini (Nova 1967) in 1967 - 71.
Not Available
| Photoelectric photometry of Nova Delphini 1967
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970PASP...82..626M&db_key=AST
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Группы:
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Наблюдательные данные и астрометрия
| Созвездие: | Дельфин |
| Прямое восхождение: | 20h42m37.20s |
| Склонение: | +18°58'31.7" |
| Видимая звёздная величина: | 9.377 |
| Собственное движение RA: | 10.2 |
| Собственное движение Dec: | 3.8 |
| B-T magnitude: | 11.102 |
| V-T magnitude: | 9.52 |
Каталоги и обозначения:
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