M 5 (NGC 5904, GCL 34) Globular Cluster in Serpens   

Located at: RA 15 hours 18 minutes 34 seconds, Dec +02 degrees 04 minutes 58 seconds

Size: 23' Magnitude: 5.7 Class: 5

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, 339 minutes (70 x 3 minute {180 seconds} plus 86 x 1.5 minute {90 seconds} subs), 06/20/21/2015; seeing 2.6-3.9 FWHM 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: M 5 has a dense core region, so I tried taking shorter than normal subs. See the 8" version.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 5904

NGC 5904 = M5
15 18 33.7 +02 04 58
V = 5.7;  Size 17.4

17.5": very bright, very large, extremely dense, edge-to-edge resolution of 
several hundred stars across 22' field (not possible to count), many stars 
arranged in arcs and streamers.  Strong even concentration to a large very 
bright core.  Third best globular cluster from northern California (5th 
brightest integrated magnitude) and can be glimpsed naked-eye in dark skies.  
Located 22' NW of 5 Serpentis (?1930 = 5.2/10.2 at 11").

13": spectacular resolution of several hundred stars from outer halo to core, 
rows of long streamers.

8": very high resolution of large, intense outer halo, many stars at edge of 
small core.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 5904
NGC 5904 = M 5.  See NGC 5897 and IC 4540. - Dr. Harold G. Corwin, Jr.