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Messier 28 in Sagittarius

Astrophotography from Ursa Major Observatory @ ROSA

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Globular star cluster (IV)
11.2’
+ 7.7 mag
Sgr
18 000 Ly
2015-10-07+09+10+11
Hacienda los Andes / Chile (1100m)
TEC RC 20” f/9 with corrector (f=4492 mm)
Astro Physics AP1600GTO
L 36x2 min / RGB 12x2 min each
02h 24min
Camera:
FLI PL16803 with Astrodon filters
Image acquisition by CEDIC team (Bernhard Hubl, Christoph Kaltseis, Markus Blauensteiner) Image processing by Bernhard Hubl
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).
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