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HD 171941


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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.

Estimation of spectral classifications for bright southern stars with interesting Stromgren indices
This paper investigates the degree of success with which uvby photometrycan be applied to predict spectral classifications for 947 A, F, and Gstars brighter than an apparent magnitude of 8.3 and with four-colorindices indicating some kind of interesting, unusual, or peculiarspectrum. One or several possible spectral classifications are estimatedfor each star from photometry alone, double stars are distinguished, andthe estimates are compared with published classifications. The resultsshow that the framework provided by uvby photometry can be extended toinclude most G and K stars, reddened stars, peculiar stars, and certaintypes of double star.

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Observation and Astrometry data

Constellation:Télescope
Right ascension:18h40m08.55s
Declination:-51°39'08.3"
Apparent magnitude:7.841
Distance:490.196 parsecs
Proper motion RA:-3.3
Proper motion Dec:-19.2
B-T magnitude:8.743
V-T magnitude:7.916

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 171941
TYCHO-2 2000TYC 8372-1883-1
USNO-A2.0USNO-A2 0375-36169016
HIPHIP 91544

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