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HD 50126

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On the Variability of A0-A2 Luminosity Class III-V Stars We study the Hipparcos Satellite photometry of A0-A2 luminosity classIII-V stars. Most are not particularly variable. A few stars for whichfurther study is desirable are identified.
Two-colour photometry for 9473 components of close Hipparcos double and multiple stars Using observations obtained with the Tycho instrument of the ESAHipparcos satellite, a two-colour photometry is produced for componentsof more than 7 000 Hipparcos double and multiple stars with angularseparations 0.1 to 2.5 arcsec. We publish 9473 components of 5173systems with separations above 0.3 arcsec. The majority of them did nothave Tycho photometry in the Hipparcos catalogue. The magnitudes arederived in the Tycho B_T and V_T passbands, similar to the Johnsonpassbands. Photometrically resolved components of the binaries withstatistically significant trigonometric parallaxes can be put on an HRdiagram, the majority of them for the first time. Based on observationsmade with the ESA Hipparcos satellite.
Secondary UVBY standards in the Harvard E-regions Photoelectric uvby photometry for 201 stars which are already UBV (RI)cstandards is presented. The photoelectric data are closely tied to theCousins uvby standards and the stars should be suitable for use asfainter (7-11 mag) secondary standards.
Secondary standards for H-beta photometry in the Southern Hemisphere (second series). Not Available
UBV (RI)c standard stars in the E- and F-regions and in the Magellanic Clouds - a revised catalogue. Not Available
Secondary standards for the Stromgren UVBY system Observations of 158 E region stars have been made in the Stromgrensystem, using the 46-cm reflector at Cape Town. They are mostly brighterthan eighth magnitude and are intended for use as secondary standardsfor the four-color system. The E region relative zero points are definedwith a precision of + or - 0.001 mag, and the internal standard errorsof the colors life between + or - 0.001 and + or - 0.002 mag.
UBV photometry of E region standard stars of intermediate brightness Photometry data are given for 335 stars in the nine E regions.Observations were made using a photometer and filters on the 47 cmreflector at Cape Town. The stellar dispersions are summarized. Data arepresented in tabular form.
Up-To UBVRI Values for the E-Region Standard Stars Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1981A&AS...46....7V&db_key=AST
Photometric standard stars for the UBV and (RI)KC systems. Not Available
VRI standards in the E regions Not Available
Standard Stars for VRI Photometry with S25 Response Photocathodes [Errata: 1974MNSSA..33....1C] Not Available
Standard magnitudes in the E regions. Not Available

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Osservazione e dati astrometrici

Costellazione:	Poppa
Ascensione retta:	06^h49^m31.58^s
Declinazione:	-45Â°34'00.7"
Magnitudine apparente:	7.121
Distanza:	171.527 parsec
Moto proprio RA:	1.6
Moto proprio Dec:	19.7
B-T magnitude:	7.091
V-T magnitude:	7.119

Cataloghi e designazioni:

Nomi esatti	(Edit)
HD 1989	HD 50126
TYCHO-2 2000	TYC 8117-1556-1
USNO-A2.0	USNO-A2 0375-02814172
HIP	HIP 32715

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