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Walraven photometry of nearby southern OB associations
Homogeneous Walraven (VBLUW) photometry is presented for 5260 stars inthe regions of five nearby southern OB associations: Scorpio Centaurus(Sco OB2), Orion OB1, Canis Major OB1, Monoceros OB1, and Scutum OB2.Derived V and (B - V) in the Johnson system are included.
| Visual measurements of southern double stars
A double-star observing program is described which has been started atCordoba with a 30 cm refractor. Usually neglected Index Catalog ofVisual Double Stars (IDS) pairs south of -60 deg are selected forobservation, most of them having been measured only one or two timespreviously. A total of 174 micrometric observations of 78 wide pairs arepresented together with a few measurements of 9 double stars not foundin the IDS. Also reported is a list of 135 additional measurements of 26test stars. By comparison with all earlier observations, an estimate forthe personal equation has been made, which is applied in combinationwith catalogue proper motions to investigate the nature of many of thesepairs.
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Observation and Astrometry data
| Constellation: | りゅうこつ座 |
| Right ascension: | 09h24m38.66s |
| Declination: | -70°24'35.8" |
| Apparent magnitude: | 7.924 |
| Distance: | 326.797 parsecs |
| Proper motion RA: | -12.2 |
| Proper motion Dec: | 13.9 |
| B-T magnitude: | 7.867 |
| V-T magnitude: | 7.92 |
Catalogs and designations:
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