M 28 (NGC 6626, GCL 94) Globular Cluster in Sagittarius

Located at: RA 18 hours 24 minutes 33 seconds, Dec -24 degrees 52 minutes 12 seconds

Size: 13.8' Magnitude: 6.9 Class: 4

North is up

West to the right

Telescope:

8" f5 Newtonian reflector

Camera:

 ST-8XME, self-guided, binned 1x1, temp -20c, camera control MaxIm DL 4.56

Image:

Lumicon Deep Sky filter, 240 minutes (24 x 10 minute subs), 09/8/9/2007

Processing:

CCDStack 1.3, Photoshop 7.0

Location:

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

Notes: From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6626

NGC 6626 = M28 = E522-SC023
18 24 32.8 -24 52 11
V = 6.9;  Size 11.2

17.5" (7/10/99): striking globular at 220x, with the halo appearing ~4.5' in 
diameter and a very bright core ~2'x1.5' elongated SSW-NNE.  Extensive 
resolution at 280x and 380x with roughly 50 stars resolved in the halo.  At 380x 
the edges of the core really start breaking up into numerous stars and a rich 
sprinkling of stars is superimposed on the well-defined core.  On the north side 
of the halo a long star chain heads directly north and a fainter but richer 
chain starts to trail off the E side of the core but abruptly turns in a chain 
heading NNW.

13": very bright, fairly large, sharp concentration with a lively unresolved 
core.  A few stars are resolved at the edges of the core over haze and many 
stragglers resolved including long spidery chains.  A total of a few dozen stars 
resolved.  Excellent view at 290x and a star chain to the N is prominent.

8": bright, sharp concentration, lively halo just resolves into many faint stars 
at 200x!

- by Steve Gottlieb