nrwalborn on 05-Jan-2011 00:02:57 GMT about HD 191423
The spectral type A9 V ascribed to this star and attributed to Morgan et al. 1955 is a typographical error. The type listed in that reference is O9 V: . The current type is ON9 II-IIInn (http://arxiv.org/abs/1012.0533 and references therein).
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View annotation on HD 191423 object