M 72 (NGC 6981, GCL 118) Globular Cluster in Aquarius

Located at: RA 20 hours 53 minutes 28 seconds, Dec -12 degrees 32 minutes 13 seconds

Size: 6.6' Magnitude: 9.2 Class: 9

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, 490 minutes (49 x 10 minute subs), 10/11/12/2014; FWHM 2.4-4.3 per CCDStack

Processing:

CCDStack 2.83.5392.25518, Photoshop CS5.1

Location:

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

Notes: See the 8" version.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6981

NGC 6981 = M72
20 53 27.9 -12 32 13
V = 9.2;  Size 6

17.5" (7/17/01): at 380x, the halo is very irregular and the globular has a very 
uneven surface brightness.  The non-symmetrical halo is elongated ~E-W, perhaps 
4'x3'.  The brighter 1.5' core is covered with a sprinkling a 8-10 faint stars.  
From the core there are short ragged extensions to the SW and NW with a few 
resolved stars.  More prominent is a nearly detached clump on the E side which 
is extended ~N-S and contains roughly 8 easily resolved stars over haze.  In 
total, perhaps two dozen stars are resolved in moments of good seeing.

17.5" (8/13/88 and 8/2/86): very mottled ragged appearance, 3' diameter.  About 
20 stars are resolved at the edges and over the core.

13" (9/29/84): very mottled non-symmetrical appearance with a bright core.  
Roughly a dozen stars are resolved mostly on the E side of the core.  A brighter 
mag 13.5 star is in the NE side of the halo.

- by Steve Gottlieb