M 55 (NGC 6809, GCL 113) Globular Cluster in Sagittarius

Located at: RA 19 hours 39 minutes 59 seconds, Dec -30 degrees 57 minutes 44 seconds

Size: 19' Magnitude: 6.3 Class: 11

North is up

West to the right

Telescope:

 14.5" f5 Newtonian reflector

Camera:

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

Image:

No filter, 45 minutes, 09/18/1993

Processing:

D-19, 8.0 minutes @ 69F, 35mm negative scanned with Polaroid SprintScan 4000 (4000 dpi)

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

Location:

near Mt Pinos, CA

Notes: This is one of the Messier objects not currently 'visible' from my Thousand Oaks observatory ... 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 1600 pixels, and saved under "Save for Web & Devices".

From the NGC / IC Project:

Contemporary Visual Observation(s) for NGC 6809
NGC 6809 = M55 = E460-SC21
19 39 59.3 -30 57 44
V = 6.4;  Size 19

17.5" (7/14/99): at 100x this a beautiful, highly resolved cluster with outliers 
extending out to at least 12' in diameter.  At 220x, there is uniform covering 
of easily resolved stars across the halo and the broadly concentrated core.  In 
addition the central region is contains a layer of very faint stars over 
unresolved haze.  The star density drops off rapidly in the outer halo and 
becomes very scraggly around the periphery.  The core also seems indented on the 
SE side with a void in the halo on this edge.

13": bright, large, superb resolution of at least 75 stars mag 12 and fainter.  
Loosely compressed with a broadly brighter core, irregular background glow.  One 
of the easiest resolved globulars.

8": faint stars resolved across entire disc, no compact core, over unresolved 
haze, high resolution at 165x.

- by Steve Gottlieb