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מאמרים קשורים
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.
| UVBY photometry of wide visual double stars. III
The observed magnitudes and color indices b-y, m1, and c1 are obtainedfor the components of 31 visual double stars and one triple system. Theabsolute magnitudes of the components are calculated, and the physicalcharacteristics of the systems are examined.
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הכנס מאמר חדש
לינקים קשורים
הכנס לינק חדש
משמש של הקבוצה הבאה
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תצפית ומידע אסטרומטרי
| קבוצת-כוכבים: | שור |
| התרוממות ימנית: | 04h47m10.50s |
| סירוב: | +20°26'58.4" |
| גודל גלוי: | 10.412 |
| תנועה נכונה: | -6.2 |
| תנועה נכונה: | -5.9 |
| B-T magnitude: | 10.858 |
| V-T magnitude: | 10.449 |
קטלוגים וכינוים:
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