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Open Cluster
Messier 52

Object : M 52
Coordinates/Direction : RA: 23h24m, DEC: +61o35'
Object size : 13'
Object magnitude : 5.0
More to know : Wikipedia: wiki/ Messier 52

M52 2016 (click on the image to get a full resolution photo i a new window)
Date : 2016-03-17
Time (UT) : 01:20 to 01:51
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 : 22x60 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 : This was the last photo this night, I got 22 images before the sky was too bright. As most open cluster also this one is very beautiful.

Zoom in 1, NGC 7635

NGC 7635 Bubble Nebula
Coordinates/Direction : RA: 23h20m, DEC: +61o12'
Object size :
Object magnitude : 10
Object : NGC 7635 Bubble Nebula
Date : 2016-03-17
Comment : This is a strong zoom in of the Bubble Nebula. Nebulas are very hard for me to catch because of the light pollution so I'm very pleased to get this. You find this nebula in direction four a clock about one third of the distance from center in the main image, look at the full resolution image.
More to know : Wikipedia: wiki/ NGC 7635

Zoom in 2, NGC 7538

NGC 7538
Coordinates/Direction : RA: 23h13m, DEC: +61o28'
Object size : 9' x 6' 
Object magnitude :
Object : NGC 7538 
Date : 2016-03-17
Comment : Also this is a strong zoom in of a weak nebula. The strange color of the stronger stars comes from the fact that they are oversaturated. You find this nebula in direction three a clock close to the right edge in the main image.
More to know : Wikipedia: wiki/ NGC 7538
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