NGC 6366 (GCL 65) Globular Cluster in Ophiuchus
Located at: RA 17 hours 27 minutes 44 seconds, Dec -05 degrees 04 minutes 36 seconds
Size: 13' Magnitude: 9.5 Class: 11
North is up
West to the right
8" f5 Newtonian reflector
ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.54
Red (Hoya 25A) filter, 220 minutes (22 x 10 minute subs), 08/16/17/2006
CCDStack 1.1, Photoshop 7.0
Rolling Roof Observatory, Thousand Oaks, California 91360 (+34d 13m 29s -118h 52m 20s)
NGC 6366 has a similar problem as NGC 2024 (Flame Nebula) ... a bright star is causing the north-south fan shaped reflection (that is not a blooming artifact) ... probably caused by my cheap red Hoya filter.
See the 14.5" version.
From the NGC / IC Project:Contemporary Visual Observation(s) for NGC 6366
NGC 6366 17 27 44.3 -05 04 36 V = 9.0; Size 8.3 17.5" (7/20/98): at 220x appears as a diffuse irregular glow, ~4' diameter, with only a weak concentration. Two mag 9 and 10 stars are off the W side, the nearest is less than 4' from center and a closer pair of mag 11.5-12 stars [45" separation] is at the S edge. There are perhaps a half dozen faint but obvious stars visible over the ill-defined glow including a couple of mag 14 stars 2' S of center, one a similar distance E of center and an addition pair on the SE side. About a dozen stars are visible with careful viewing. At 280x, the cluster is pretty clumpy and starting to really break up into numerous very faint stars. Roughly two dozen stars can be glimpsed with averted vision, many near the threshold of visibility. The full extent of the cluster is difficult to trace but extends beyond the central 4' region. 13": large, diffuse, very weak concentration. About a dozen faint stars are resolved over a hazy background. Located 17' E of 47 Ophiuchi (V = 4.5). 8": large, very diffuse, unresolved. Located 15' E of a mag 4.5 star which detracts. - by Steve Gottlieb