M 55

75%  resolution (2.3MB)

DSLR widefield image

Object data of M55

Object type: Globular cluster (XI)
Size: 19.1'
Magnitude: 6.3 mag
Constellation: Sgr
Distance: 17,000 Ly
Notes: Messier 55 is a quite large globular star cluster in the constellation Sagittarius, but has a very loose appearence.

Exposure data

Date: 2015-10-12 + 2015-10-14 + 2015-10-15
Location: Hacienda Los Andes / Chile (1100m)
Telescope: RCOS 14.5" f/9
Camera: FLI PL16070 with Astrodon filters
Binning: L 1x1 / RGB 1x1
Mount: Astro-Physics AP1200GTO
Exposure time: L 6x8min + 2x3min / R 15x3min / G 15x3min / B 15x3min
Exposure time total: 3h09min
Notes: Image acquisition by CEDIC team (Markus Blauensteiner, Christoph Kaltseis, Bernhard Hubl)

Image processing by Markus Blauensteiner