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HD 174919


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A photometric investigation of cluster membership for the Cepheid BB Sagittarii
Photoelectric UBV and VRI photometry is presented for the close pair ofopen clusters Cr 394 and NGC 6716 and for the 6.64 d classical CepheidBB Sgr. For Cr 394, E(B-V) = 0.25 + or - 0.01, V(0)-M(V) = 9.04 + or -0.08, d = 643 + or - 25 pc, age is about 60 million yr, nuclear radiusis 9 arcmin, and tidal radius is 27 arcmin. For NGC 6716, E(B-V) = 0.11+ or 0.01, V(0)-M(V) = 9.07 + or - 0.17, d = 650 + or - 52 pc, age isabout 60 million yr, nuclear radius 7 arcmin. The data combined withstar counts for the region of the cluster demonstrate that the Cepheidis a likely member of Cr 394.

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Observation and Astrometry data

Constellation:いて座
Right ascension:18h53m48.61s
Declination:-19°47'49.7"
Apparent magnitude:6.954
Distance:512.821 parsecs
Proper motion RA:0.6
Proper motion Dec:-17.5
B-T magnitude:8.737
V-T magnitude:7.102

Catalogs and designations:
Proper Names   (Edit)
HD 1989HD 174919
TYCHO-2 2000TYC 6289-2467-1
USNO-A2.0USNO-A2 0675-30470870
HIPHIP 92733

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