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Submit a new article| Spectral types for early-type stars observed by SKYLAB MK spectral types are presented for 246 early-type stars observed withthe S-019 ultraviolet stellar astronomy experiment on Skylab. K-linetypes are also given where applicable, and various peculiar stars areidentified. The peculiar stars include five silicon stars, a shell star,a helium-rich star, a silicon-strontium star, a chromium-europium star,and two marginal metallic-line stars.
 
 
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 Observation and Astrometry data
| Constellation: | Cygnus |  | Right ascension: | 21h42m21.09s |  | Declination: | +50°51'28.9" |  | Apparent magnitude: | 7.227 |  | Distance: | 420.168 parsecs |  | Proper motion RA: | 1.8 |  | Proper motion Dec: | -0.9 |  | B-T magnitude: | 7.165 |  | V-T magnitude: | 7.222 |  Catalogs and designations:
 
 
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