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NGC 7822

Object : NGC 7822
Coordinates/Direction : RA: 00h01m, DEC: +67o25'
Object size : 100'
Object magnitude :  - 
More to know : Wikipedia: wiki/ NGC_7822

NGC 7023 Iris Nebula 2024-03-06

NGC 7023 Iris Nebula, 2024 (Click on image and get a full resolution image in a new window)
Date : 2020-03-21
Time (UT) : 01:00 - 01:59
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 : 33x90 seconds = 49 minutes, iso1600, dithering mode
Image process tool : Siril, Gimp, Irfanview
Processing : synthetic bias, flat, photometric color calibration
Weather : clear, temperature -2o C
Site : Sweden, Stockholm, Hagsätra. Bortle 9
Free view Az: 20o-90o, 165o-185o, La: 20o-55o
Comment : This is a really big nebula, too big to this telescope. It covers the whole field and more. My shorter 300 mm telescope had fit better. The sad thing, this nebulas as others emit at the H-Alpha 656 nm wave length. Something the a standard DSLR camera can't receive very good. It must have the IR block filter removed, later some day I fix that. There isn't a trace of the nebulosity on the photo. Here is a plate solve of the nebula NGC 7822 , the ring represent the inner region of the nebula, from
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