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HD 38109

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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.
An Analysis of the Hauck / Mermilliod Catalogue of Homgeneous Four-Color Data - Part Two Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1980A&AS...40..199P&db_key=AST
A photometric study of the Orion OB 1 association. III - Subgroup analyses Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1978ApJS...36..497W&db_key=AST
A photometric study of the Orion OB 1 association. I - Observational data. A catalog of observational data is presented for stars in the region ofthe young stellar association Orion OB 1. Photoelectric observationsobtained in the uvby-beta and UBV systems are compiled along withprevious photoelectric and spectroscopic data for all these stars aswell as for several bright members of the association with availablephotometric indices. Mean weighted values are computed for thephotometric data and summarized in tables expected to be reasonablycomplete for association members earlier than spectral type A0.Membership criteria are derived, and qualitative membershipprobabilities summarized, for the 526 stars in the final program. Theanalytical procedures are discussed for association stars of B,intermediate, and AF types. Effects of the nebular environment andvarious calibrations of Balmer-line and four-color indices areconsidered for the determination of absolute magnitudes for the B-typestars.
Metallicism in Border Regions of the AM Domain. I. Extremely Young AM Stars in the Orion 1c Association Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972ApJ...175..765S&db_key=AST

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Osservazione e dati astrometrici

Costellazione:	Orione
Ascensione retta:	05^h43^m05.23^s
Declinazione:	-05Â°48'27.5"
Magnitudine apparente:	9.468
Moto proprio RA:	-5.2
Moto proprio Dec:	-14.7
B-T magnitude:	9.837
V-T magnitude:	9.499

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 38109
TYCHO-2 2000	TYC 4779-633-1
USNO-A2.0	USNO-A2 0825-01648563
HIP	HIP 26949

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