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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.
| Appulses and occultations of SAO stars by Mercury - 1987-1995
While no readily observable occultations were found in the presentpredictions for 78 close approaches by Mercury to stars in theSmithsonian Astrophysical Observatory catalog (1966) over the periodJanuary 1, 1987-December 31, 1995, seven occultations of stars withvisual magnitudes of 7 or fainter are noted. These events are presentedwith a view to searches for material in the vicinity of Mercury, as wellas investigations requiring close, bright stars for the improvement ofground-based Mercury images.
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Observation and Astrometry data
| Constellation: | Οφιούχος |
| Right ascension: | 16h57m52.04s |
| Declination: | -24°55'07.4" |
| Apparent magnitude: | 8.951 |
| Distance: | 65.746 parsecs |
| Proper motion RA: | -32.1 |
| Proper motion Dec: | -63.2 |
| B-T magnitude: | 9.752 |
| V-T magnitude: | 9.018 |
Catalogs and designations:
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