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HD 52474 (Zhurina Darya Sergeevna)


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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

Color excesses of classical cepheids. I
The color excesses of eleven cepheids have been determined with the aidof photometry of field stars found in the proximity of the variables. Acomparison of the color excesses with previous color-excess results isgiven. Four cepheids: RT Aur, DT Cyg, Zeta Gem, and T Vul, haverelatively small and well-established reddening values. These fourstars, along with Alpha UMi, can serve as standards to calibratereddening-free indices with intrinsic color indices such as (b-y) or(B-V).

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Observation and Astrometry data

Constellation:ふたご座
Right ascension:07h02m13.47s
Declination:+20°49'41.5"
Apparent magnitude:7.826
Distance:325.733 parsecs
Proper motion RA:-2.5
Proper motion Dec:-8.3
B-T magnitude:7.905
V-T magnitude:7.833

Catalogs and designations:
Proper NamesZhurina Darya Sergeevna
HD 1989HD 52474
TYCHO-2 2000TYC 1356-518-1
USNO-A2.0USNO-A2 1050-04701273
HIPHIP 33906

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