NGC 6604 (Lund 823, Cr 373) Open Cluster in Serpens Cauda

Located at: RA 18 hours 18 minutes 06 seconds, Dec -12 degrees 13 minutes 00 seconds

Size: 6.0' Magnitude: 6.5 Class: I 3 m n

North is up

West to the right

Telescope:

8" f5 Newtonian reflector

Camera:

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

Image:

Lumicon Red filter, 380 minutes (38 x 10 minute subs), 08/28/30 & 09/1/2008; seeing 2.4-5.4 FWHM per CCDStack

Processing:

CCDStack 1.3.7, Photoshop 7.0

Location:

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

Notes:

NGC 6604 is centered in this image, and is located about 1.6 degrees NNW of M 16. The cluster is in a rich Milky Way field, that includes the large Bright Nebula Sh2-54 (144' x 78', Sharpless 3 3 3) that is seen as the faint nebulosity throughout this field.

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6604

NGC 6604 = Sh 2-54 = Cr 373
18 18 03 -12 14 35
V = 6.5;  Size 2.0

17.5": at 140x appears as a prominent 2' arc of five stars including a mag 7.5 
star and a double star on the SW end.  Surrounding this arc is a 5' group of 
roughly two dozen stars elongated N-S which include two faint pairs.  The larger 
association was not viewed.

16x80 finder: very large, very faint emission haze surrounding a very large 
group of stars, improves with UHC filter.  Eagle nebula very prominent in field 
to the south.

- by Steve Gottlieb