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HD 186829 (l@Zy)


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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:Sagittarius
Right ascension:19h47m48.25s
Declination:-28°29'28.2"
Apparent magnitude:6.902
Distance:290.698 parsecs
Proper motion RA:1.5
Proper motion Dec:-1.1
B-T magnitude:8.182
V-T magnitude:7.008

Catalogs and designations:
Proper Namesl@Zy
HD 1989HD 186829
TYCHO-2 2000TYC 6902-2041-1
USNO-A2.0USNO-A2 0600-41580462
HIPHIP 97401

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