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HD 35329


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Empirical temperature calibrations for early-type stars
Three temperature calibrations of suitable photometric quantities havebeen derived for O and B stars. A sample of 120 stars with reliableT(eff.) determinations has been used for establishing each calibration.The different calibrations have been critically discussed and compared.Temperature determinations for 1009 program stars have been obtainedwith an accuracy of the order of 10 percent.

E(B-V) determination from an UV-visual two-colour diagram - O and B stars in the Catalogue of Stellar Ultraviolet Fluxes
For the O and B type stars in the Catalogue of Stellar UltravioletFluxes, an approach is presented which does not require a preciseknowledge of spectral type and luminosity class for deriving E(B-V)color excesses. The method is based on the use of an UV-visual two-colordiagram; galactic variations in the interstellar extinction law areanalyzed and fully taken into account. The results have been comparedwith those derived by using the differences between observed andintrinsic colors for stars with known spectral classification. The verygood agreement in a large number of cases (94 percent) demonstrates thatthe present approach permits the derivation of reliable color excessvalues for early-type stars even if only a rough spectral classificationis available.

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Observation and Astrometry data

Constellation:オリオン座
Right ascension:05h24m34.75s
Declination:+15°58'31.0"
Apparent magnitude:8.504
Distance:456.621 parsecs
Proper motion RA:-7.4
Proper motion Dec:-3.9
B-T magnitude:8.67
V-T magnitude:8.518

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 35329
TYCHO-2 2000TYC 1296-1762-1
USNO-A2.0USNO-A2 1050-01979243
HIPHIP 25287

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