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HD 195254


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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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观测天体数据

星座:天鵝座
右阿森松:20h28m30.75s
赤纬:+43°31'23.5"
视星:7.682
距离:208.768 天文距离
右阿森松适当运动:9.6
赤纬适当运动:3.6
B-T magnitude:7.68
V-T magnitude:7.682

目录:
适当名称
HD 1989HD 195254
TYCHO-2 2000TYC 3164-1342-1
USNO-A2.0USNO-A2 1275-13948009
HIPHIP 100989
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