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HD 50849


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New Estimates of the Solar-Neighborhood Massive Star Birthrate and the Galactic Supernova Rate
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Catalog of Galactic OB Stars
An all-sky catalog of Galactic OB stars has been created by extendingthe Case-Hamburg Galactic plane luminous-stars surveys to include 5500additional objects drawn from the literature. This work brings the totalnumber of known or reasonably suspected OB stars to over 16,000.Companion databases of UBVβ photometry and MK classifications forthese objects include nearly 30,000 and 20,000 entries, respectively.

Precise equatorial coordinates of double and multiple systems - an astronomical support to the HIPPARCOS mission
Results are presented on determinations of precise positions (to theaccuracy required for their possible inclusion in the Hipparcos InputCatalogue) of 623 double and multiple stars (126 of them newlydiscovered) from the measurement of 39 plates taken at the ESO and theAstronomical Observatory of Torino, obtained between 1984 and 1987. Thetable includes the index number, the name of the discoverer, binarycomponent according to the designation by the Catalogue de Composantesd'etoiles Doubles et Multiples (CCDM), the magnitude of the componentsas given in the CCDM, epoch of observation, right ascension referred tothe J2000.0 equinox, declination, position angle referred to the J2000.0North Pole, angular separation, and DM and ADS numbers.

Walraven photometry of nearby southern OB associations
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Osservazione e dati astrometrici

Costellazione:Cane Maggiore
Ascensione retta:06h54m20.21s
Declinazione:-14°14'34.1"
Magnitudine apparente:9.551
Moto proprio RA:3.3
Moto proprio Dec:3.3
B-T magnitude:9.54
V-T magnitude:9.551

Cataloghi e designazioni:
Nomi esatti   (Edit)
HD 1989HD 50849
TYCHO-2 2000TYC 5392-92-1
USNO-A2.0USNO-A2 0750-03042936
HIPHIP 33177

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