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TYC 3164-1226-1


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Interstellar extinction in the vicinity of the North America and Pelican Nebulae. II
The results of photoelectric photometry of 564 stars in the Vilniusseven-color system in three areas near the North America and PelicanNebulae are given. Photometric spectral types, absolute magnitudes,color excesses, interstellar extinction,s and distances to the stars aredetermined. We find that the dark cloud separating both nebulae is at580 pc distance. A number of stars immersed in the dark cloud have beenfound. It seems that the dark cloud extends south down to 40 degdeclination. The area southwest of alpha Cygni in the declination zones42 deg and 43 deg is comparatively transparent at least up to 1 kpc.

The spectra, magnitudes and colours of O-A type stars in an area of the Milky Way, with the Center alpha = 20h16m, delta = +42 D 30'.
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Observation and Astrometry data

Constellation:Cygnus
Right ascension:20h25m39.61s
Declination:+43°58'03.2"
Apparent magnitude:9.598
Proper motion RA:-6.3
Proper motion Dec:-8.2
B-T magnitude:9.625
V-T magnitude:9.601

Catalogs and designations:
Proper Names
TYCHO-2 2000TYC 3164-1226-1
USNO-A2.0USNO-A2 1275-13910791
HIPHIP 100753
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