M 14 (NGC 6402, GCL 72) Globular Cluster in Ophiuchus

Located at: RA 17 hours 37 minutes 36 seconds, Dec -03 degrees 14 minutes 45 seconds

Size: 11' Magnitude: 7.6 Class: 8

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,  390 minutes  (39 x 10 minute subs), 07/30/31/2014; seeing 2.5-3.8 FWHM per CCDStack

Processing:

CCDStack 2.80.5308.25197, Photoshop CS5.1

Location:

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

Notes: See the 8" version.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6402

NGC 6402 = M14
17 37 36.1 -03 14 45
V = 7.6;  Size 11.7

17.5" (7/1/00): this bright, large, fairly symmetric globular appears elongated 
~E-W and ~7'x5' in size at 220x.  The bright core is relatively large at 4', 
very lively and granular with a layer of very faint stars.  At 280x, ~30 stars 
are resolved in the small halo and at the edge of the intense core.  A rich, 
even sprinkling of faint stars cover the core.  Difficult to count resolved 
stars as numerous dim stars pop out with averted vision over the bright 
background haze, but perhaps 60-70 stars in total are resolved.

17.5": bright, large, 25-30 very faint stars are resolved mostly at the edges 
which have a ragged appearance.

13": fairly large, broad concentration.  About a dozen very faint stars are 
resolved across the disk.  The outer halo fades out smoothly.

- by Steve Gottlieb