NGC 6934 is the larger and brighter of the two prominent globular clusters in Delphinus, with a visual magnitude of 8.8 and an apparent diameter of 8.4'.
William Herschel discovered this globular cluster on September 24, 1785 and cataloged it as H I.103.
NGC 6934 lies it a rich star field. Walter Scott Houston wrote of NGC 6934, "because of its setting, I find it a particularly pretty object for rich-field telescopes." In 6-inch or smaller instruments this globular will appear as a round, hazy patch of sky with very fuzzy, indistinct edges. Larger telescopes will begin to resolve the cluster as individual stars. Make sure to try a range of magnifications.
The other prominent globular in Delphinus, NGC 7006, appears quite differently, making for an excellent study in contrasts.
NGC 6934 is a 15 billion-year-old ball of hundreds of thousands of stars. Dating stars in ancient globular clusters like NGC 6934 provides valuable constraints on the minimum age of the universe.
NGC 6934 is located 51,200 light years from the Sun, and 41,700 light years from the galactic center.