M 28 Globular Cluster in Sagittarius

Charles Messeier discovered this Globular Cluster in the constellation of Sagittarius in 1764 ans described it as a "nebula without stars".

Nowadays it can easily be ssen,dissolved into single stars,with instruments of 8"-aperture and bigger.

By a magnitude of 7.5mag and sized slightly larger than 10 arc-minutes it is located in a very star-rich region and therefore shows yellowish colors caused by interstellar dust-absorption.

The real distance to us is 17.900 light-years with a diameter of about 80 light-years.Twelfe millisecond pulsars were detected in M28 since 1986,the third largest number of pulsars in a globular cluster yet known.


position (epoch2000):

RA.: 18h 24m 32,9s
Decl.: −24° 52′ 11″


image data:

LRGB image with L = synth.of all, RGB = 6x1200s each,a total of 6.0 hours

80cm f/7 AstroOptik Keller corrected cassegrain FLI Proline 16803 Astrodon LRGB GenII filters

Prompt 7 CTIO/UNC Chile,remote controlled

image processing: Bernd Flach-Wilken


this picture of M28 shows 87% of the FOV from our eqipment.Click here to get full resolution

here is a more detailed look to M28:

a look to M28 with the HST can be seen here



Last modified on Friday, 31 May 2019 11:02

Go to top