M 70 (NGC 6681, GCL 101) Globular Cluster in Sagittarius 

Located at: RA 18 hours 43 minutes 13 seconds, Dec -32 degrees 17 minutes 31 seconds

Size: 8.0' Magnitude: 7.8 Class: 5

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, 42 F outside temp

Image:

No filter, 60 minutes, 08/26/2000

Processing:

D-19, 7.0 minutes @ 69F, negative scanned with Polaroid SprintScan 4000 (4000 dpi), scan is a crop from 35mm negative, scan processed in Photoshop CS5.1

Location:

 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 6681
NGC 6681 = M70 = E458-SC3
18 43 12.6 -32 17 31
V = 8.1;  Size 7.8

17.5" (7/14/99): At 220x, M70 displays a 3' round halo and is very well 
concentrated to a small bright core and intense nucleus.  A string of three 
brighter stars extends to the N from the NE end and a number of stars are 
resolved in the halo.  At 280x, ~15-20 faint stars are resolved in the halo and 
at the edge of the core, particularly on the south side over a very lively 
background.

13": very small bright core, faint stars are resolved at the edges.  A bright 
string of stars at the following side trails to the NNE.

8": few faint stars resolved at high power, bright core.  The halo appears 
flattened on the E side.

- by Steve Gottlieb