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HD 74944


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Radial velocities. Measurements of 2800 B2-F5 stars for HIPPARCOS
Radial velocities have been determined for a sample of 2930 B2-F5 stars,95% observed by the Hipparcos satellite in the north hemisphere and 80%without reliable radial velocity up to now. Observations were obtainedat the Observatoire de Haute Provence with a dispersion of 80Ä,mm(-1) with the aim of studying stellar and galactic dynamics.Radial velocities have been measured by correlation with templates ofthe same spectral class. The mean obtained precision is 3.0 km s(-1)with three observations. A new MK spectral classification is estimatedfor all stars. Based on observations made at the Haute ProvenceObservatory, France and on data from The Hipparcos Catalogue, ESA.Tables 4, 5 and 6 are only available in electronic form at the CDS viaanonymous ftp to cdsarc.u-strasbg.fr or viahttp://cdsweb.u-strasbg.fr/Abstract.htm

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Gözlemler ve gökölçümü verileri

Takýmyýldýz:Su Yilani
Sað Açýklýk:08h47m10.46s
Yükselim:+04°21'28.8"
Görünürdeki Parlaklýk:7.361
Uzaklýk:205.339 parsek
özdevim Sað Açýklýk:1.2
özdevim Yükselim:-2.8
B-T magnitude:7.399
V-T magnitude:7.365

Kataloglar ve belirtme:
Özgün isimleri   (Edit)
HD 1989HD 74944
TYCHO-2 2000TYC 220-1221-1
USNO-A2.0USNO-A2 0900-06150714
HIPHIP 43136

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