"M 24"* (as NGC 6603 <Cr 374>) Open Cluster in Sagittarius

NGC 6603 is located at: RA 18 hours 18 minutes 28 seconds, Dec -18 degrees 24 minutes 24 seconds

Size: 4.0' Magnitude: 11.1 Class: I 2 r n

North is up

West to the right


 14.5" f5 Newtonian reflector


Miranda Laborec 35mm camera, ST4 guided, hypered Kodak Technical Pan 2415 film, 54 F outside temp


No filter, 60 minutes, 08/22/2003


D-19, 7.0 minutes @ 68F, 35mm negative scanned with Polaroid SprintScan 4000 (4000 dpi)

Scan is a crop from 35mm negative, scan processed in Photoshop CS5.1


Figueroa Lookout, CA

Notes:* If "M 24" is considered a 2 degree Star Cloud (or Open Cluster), it is way to large for my current imaging field (about 31' x 46'). However, I can still image various parts of what is included in the star cloud ... B 92 / 93 and NGC 6603. In an effort to 'fill in' my Messier images page, I will post what film images I have. My film scanner is not presently hooked up, so I am using scans made for my old film website from the early 2000's.

Most of the film scans from the 14.5" f5 Newtonian reflector were centered on the object of interest, and were generally scanned to file as a 2000 x 2000 pixel crop of the 35mm negative.

Reduced in Photoshop to 1024 pixels, and saved under "Save for Web & Devices".

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6603
NGC 6603 = Cr 374
18 18 27 -18 24.4
Size 5

13.1": excellent resolution into 30-50 faint stars including a string oriented 
NW-SE running through the center.  The outline forms an arrowhead shape pointing 
to the E.  Situated in the NE corner of M24 in a glorious region of the Small 
Sagittarius Starcloud!  Located 4' N of mag 8 SAO 161294.  The dark nebula B93 
lies ~30' NW.

17.5": between 50 and 70 stars are resolved, extremely dense.

- by Steve Gottlieb
Historical Research Notes / Correction for NGC 6603
NGC 6603, a relatively small and faint cluster, is not M24.  The Messier 
object is actually IC 4715, which see for more. - Dr. Harold G. Corwin, Jr.
The CDS Aladin Previewer returns 18h 16m 47.9s, -18h 33m 00s when entering "M 24" in the search box.
The CDS SIMBAD Astronomical Database returns 18h16.8m -18 33 when entering "M 24" in the search box. (Queries - by identifier)
The STScI Digitized Sky Survey returns 18h 16m 48.00s, -18d 33m 00.0s when entering "M 24" in the search box.
All sets of coordinates are basically in the center of the (small Sagittarius) Star Cloud.