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M22 - the great globular cluster in Sagittarius
M22 - the great globular cluster in Sagittarius
Pascal


Photograph Information Photographer's Comments
Camera: Canon EOS-350D Rebel XT
Location: Kariani, Greece
Date: Jul 25, 2009
Aperture: f/6.3
ISO: 800
Shutter: 42.4 min (total
Galleries: Sky, Astrophotography
Date Uploaded: Sep 29, 2009

Viewed: 419
Comments: 0
Favorites: 0

 M22 lies 10500 light years away. It contains approximately 70000 stars, spread over a region about 200 light years in diameter. The cluster is receding from us at a velocity of 150 km/sec.

Details:
Telescope : Celestron C8 SCT f6.3 (with focal reducer)
Mount : Takahashi EM200 Temma II Jr
Camera : Canon 350D Baader modified
Exposure : 41 x 62 sec Lights (ISO 800), unguided
20 Darks
20 Bias
were aligned, calibrated and stacked in DSS for this final composite image (92.63% of the original FOV)

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