M 107 (NGC 6171, GCL 44) Globular Cluster in Ophiuchus

Located at: RA 16 hours 32 minutes 32 seconds, Dec -13 degrees 03 minutes 13 seconds

Size: 13' Magnitude: 7.8 Class: 10

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -15c, camera control MaxIm DL 4.56

Image:

 Lumicon Red filter, 430 minutes (43 x 10 minute subs), 07/3/4/2015; seeing 2.4-3.3 per CCDStack

Processing:

CCDStack 2.90.5589.16047, Photoshop CS5.1

Location:

 Rolling Roof Observatory, Thousand Oaks, CA 91360 (+34d 13m 29s -118h 52m 20s)

Notes: See the 8" version.

From the the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6171

NGC 6171 = M107
16 32 31.9 -13 03 13
V = 8.1;  Size 13

17.5" (7/10/99): this bright globular was well resolved at 220x, with a ~5'x3' 
halo elongated in an E-W orientation although the sharply defined core is 
circular and ~2' in diameter.  Enclosing the globular on the west, east and 
south sides are brighter mag 11.5-12.5 stars.  Roughly 30 stars are scattered 
throughout the outer halo at 280x and a couple of dozen densely packed stars 
overlay the core of the globular in steady moments.

13": bright core with several faint stars resolved in the halo and a few stars 
resolved at the edge of the core.

8": bright core, fainter halo, mottled, a few stars are visible at the NW edge.

- by Steve Gottlieb