Dreyer's description of NGC 6939 in his New General Catalog (NGC):
"Cluster, large, very compressed, extended 0°, stars of magnitude 14 to 18."
Quote from: The Deep Sky Field Guide to Uranometria 2000:
"50 stars. Moderately rich in stars; small brightness range; strong central concentration; detached."
Quote from C. Luginbuhl & B. Skiff's: Observing Handbook & Catalog of Deep-Sky Objects:
"At 50 power in a 6-inch scope it is oval, elongated North-South and only a few stars are resolved...... at 200 power a 12.5 inch scope will show about 15 stars in a 3'x2' arc minute area with a faint background haze."
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George Normandin, KAS
January 29th, 2004