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HD 192990


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Distribution of OB stars and absorbing matter in the region around P CYG
The results of spectrophotometric observations of 277 OB stars in a 7 x7-deg region around P Cyg, obtained in 8-sec, 45-sec, and 8-minexposures on ORWO ZU-21 plates with a 4-deg 272-A/mm-dispersionobjective prism on the 40-in. Schmidt telescope at BiurakanAstrophysical Observatory on October 14-19, 1979, are presented intables and graphs and characterized. Data reported include 400-480-nmabsolute spectrophotometric gradients, color excesses, and distances. Itis found that concentrations of OB stars with associated absorbingmatter exist toward the associations Cyg OB9 (two concentrations at 800and 1800 pc), Cyg OB3 (three concentrations at 1.4, 2.5, and 3.7 kpc),OB1 (at 1.6 kpc), Cyg OB8 (at 1.5 kpc), and over the entire observedregion at a distance of about 500 pc.

Structure de la galaxie dans la région de P Cygni
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Stellar Spectra and Colors in an Irregular Region in Cygnus.
Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1953ApJ...118...77A&db_key=AST

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观测天体数据

星座:天鵝座
右阿森松:20h16m39.76s
赤纬:+35°28'06.5"
视星:7.111
距离:606.061 天文距离
右阿森松适当运动:5.6
赤纬适当运动:8.3
B-T magnitude:7.083
V-T magnitude:7.109

目录:
适当名称   (Edit)
HD 1989HD 192990
TYCHO-2 2000TYC 2680-772-1
USNO-A2.0USNO-A2 1200-14844168
HIPHIP 99943

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