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Stroemgren photometry of F- and G-type stars brighter than V = 9.6. I. UVBY photometry
Within the framework of a large photometric observing program, designedto investigate the Galaxy's structure and evolution, Hβ photometryis being made for about 9000 stars. As a by-product, supplementary uvbyphotometry has been made. The results are presented in a cataloguecontaining 6924 uvby observations of 6190 stars, all south ofδ=+38deg. The overall internal rms errors of one observation(transformed to the standard system) of a program star in the interval6.5

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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Dades d'Observació i Astrometria

Constel·lació:Puppis
Ascensió Recta:07h13m58.89s
Declinació:-48°18'08.8"
Magnitud Aparent:7.452
Distancia:115.875 parsecs
Moviment propi RA:58
Moviment propi Dec:-75.4
B-T magnitude:7.863
V-T magnitude:7.486

Catàlegs i designacions:
Noms Propis   (Edit)
HD 1989HD 56265
TYCHO-2 2000TYC 8123-101-1
USNO-A2.0USNO-A2 0375-03203661
HIPHIP 34958

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