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HD 188877


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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:Sagitta
Right ascension:19h56m47.87s
Declination:+16°24'31.7"
Apparent magnitude:8.656
Distance:1219.512 parsecs
Proper motion RA:4.2
Proper motion Dec:1.3
B-T magnitude:8.618
V-T magnitude:8.653

Catalogs and designations:
Proper Names
HD 1989HD 188877
TYCHO-2 2000TYC 1616-601-1
USNO-A2.0USNO-A2 1050-15744787
HIPHIP 98149

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