M 28  -  Wide field

50%  resolution (2.7MB)

Object identification (2.7MB)

Image with 20"RC

Object data of M28

Object type: Globular star cluster (IV)
Size: 11.2'
Magnitude: 7.7 mag
Constellation: Sgr
Distance: 18,000 Ly
Notes: At about 18,000 light years distance, Messier 28 with its linear diameter of 60 light years appears considerably smaller and more compressed than its more impressive neighbour M22. In 1986, M28 became the first globular cluster where a millisecond pulsar was discovered (by the Lovell Telescope at Jodrell Bank Observatory).

Exposure data

Date: 2015-10-07 + 09 + 10 + 11
Location: Hacienda Los Andes / Chile (1100m)
Telescope: Nikon AF-S Nikkor 500mm f/4E @ f/5
Camera: Nikon D750 (ISO1600)
Mount: Astro-Physics AP1600GTO
Exposure time: 53x2min
Exposure time total: 1h 46min
Notes: Image acquisition by CEDIC team (Bernhard Hubl, Christoph Kaltseis, Markus Blauensteiner)

Image processing by Bernhard Hubl