NGC 6755 and NGC 6756

These two open clusters lie 3° east of Theta (θ) Serpentis. NGC 6755 is brighter (magnitude 7.5) and larger (14') than NGC 6756 (magnitude 10.6, 4' across). Through a 6-inch scope at medium magnification, both clusters stand out from the Milky Way background, although NGC 6755 does so more easily.