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HD 39903

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UBV photometry of galactic foreground and LMC member stars. I - Galactic foreground stars UBV photometry of 955 galactic foreground stars in the direction to theLarge Magellanic Cloud is presented. The stars have been chosen fromforeground star catalogs and have been measured to complete a new database containing entries of more than 5000 stars in the direction of theLMC. First and second order extinction coefficients at La Silla/Chileare given, which differ from the standard values because of the 1991eruption of the volcano Mt. Pinatubo.
Positional reference stars in the Magellanic Clouds The equatorial coordinates are determined of 926 stars (mainly ofgalactic origin) in the direction of the Magellanic Clouds at the meanepoch T = 1978.4 with an overall accuracy characterized by the meanvalues of the O-C coordinates, Sa = 0.35 arcsec and Sd = 0.38 arcsec,calculated from the coordinates of the Perth reference stars. Thesevalues are larger than the accuracy expected for primary standard stars.They allow the new positions to be considered as those of reliablesecondary standard stars. The published positions correspond to anunquestionable improvement of the quality of the coordinates provided inthe current catalogs. This study represents an 'astrometric step' in thestarting of a 'Durchmusterung' of the Magellanic Clouds organized by deBoer (1988, 1989).
Radial velocities from objective-prism plates in the direction of the Large Magellanic Cloud. List of 398 stars, LMC members. List of 1434 galactic stars, in the LMC direction Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1974A&AS...13..173F&db_key=AST
Spectrographic and photometric observations of supergiants and foreground stars in the direction of the Large Magellanic Cloud Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1972A&AS....6..249A&db_key=AST
Polarization measurements of stars in the Magellanic Clouds. Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1970AJ.....75..778M&db_key=AST
A Method for Determining Magellanic Membership using an Objective Prism and an Absorption Filter [errata: 1970MNSSA..29....1W, 1970MNSSA..29...13F] Not Available

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Osservazione e dati astrometrici

Costellazione:	Dorado
Ascensione retta:	05^h50^m19.75^s
Declinazione:	-67Â°03'03.6"
Magnitudine apparente:	8.33
Distanza:	176.367 parsec
Moto proprio RA:	-0.4
Moto proprio Dec:	23.2
B-T magnitude:	8.62
V-T magnitude:	8.354

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 39903
TYCHO-2 2000	TYC 8904-1416-1
USNO-A2.0	USNO-A2 0225-02474086
HIP	HIP 27570

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