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Globular Cluster
Messier 53

Object : M53, Globular Cluster
Coordinates/Direction : RA: 13h12m, DEC: +18o10'
Object size : 13'
Object magnitude : 8.3
More to know : Wikipedia: wiki/ Messier 53

M53 2020-03-20

Globular cluster M53, Sweden 2020
Date : 2020-03-20
Time (UT) : 23:55 to 00:15
Mount : SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019)
Guide : QHY5 camera with 400 mm f/6.3 lens
Lens/telescope : TS130 APO f/7 910mm, 3" focuser
Corrector/Barlow : 3" field flatter, x1. T48 connector to camera
Field (FOV) : 2.25 x 1.5o (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 : 93x60 seconds, ISO1600, dithering mode
Image process tool : AstroImageJ, Fitswork, IrfanView
Processing : demosaic, synthetic flat calibrated, hot pixel removed by dithering, level
Weather : clear with drifting clouds
Site : Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20o-90o, 165o-185o, La: 20o-55o
Comment : One more object in Southern direction. This is M53, a globular cluster and it's 58'000 light years far away. Compare with the Hubble image on the link above, it's a difference but I took this from our balcony !
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