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Globular Cluster
Messier 56

Object : M56, Globular Cluster
Coordinates/Direction : RA: 19h16m, DEC: +30o11'
Object size : 8.8'
Object magnitude : 8.3
More to know : Wikipedia: wiki/ Messier 56

M56 2016-04-11

Globular Cluster M56, Sweden 2016 (click on the image to get a full resolution photo in a new window)
Date : 2016-04-11
Time (UT) : 23:25 to 00:53
Mount : SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)
Guide : QHY5 camera with off-axis
Lens/telescope : TS130 APO f/7 910mm (682mm, f/5.2), 3" focuser
Corrector/Barlow : Riccardi 2.5" field flatter, x0.75. T48 connector to camera
Field (FOV) : 3.0 x 2.0o (full frame) before crop
camera : Canon 6D, QE=0.5, full frame, 20 Mpixel, 14 bit
camera temperature: About 6o C above surrounding temperature
Film/CCD : Raw, Cr2
Filter : none
Control system : Mount by EQMOD, camera by APT, guide by PHD2, focuser by USB-focus, ASCOM Windows PC
Exp. time : 60x60 seconds, iso800, dithering mode
Image process tool : DSS, Fitswork, Irfanview
Processing : crop, level, no cal dark&bias, only dithering
Weather : clear
Site : Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20o-90o, 165o-185o, La: 20o-55o
Comment : M56 is as other globular clusters small islands of stars. This one much smaller and weaker compared to other objects.
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