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Open Cluster
NGC 6811


Object : NGC 6811
Coordinates/Direction : RA: 19h37m, DEC: +46o23'
Object size : 13'
Object magnitude : 6.8
More to know : Wikipedia:
https://en.wikipedia.org/ wiki/ NGC 6811

NGC 6811, 2019-03-23 + 2019-04-17

NGC 6811 Open cluster April 17, 2019 (click on the image to get a full resolution photo in a new window)
Date : 2019-03-23 + 2019-04-17
Time (UT) : -
Mount : EQ6 controlled by EQMOD
Guide : PHD2 in dithering mode, Guide telescope 400 mm f/6.3, camera QHY5
Lens/telescope : TS130, 910mm f/7
Corrector/Barlow : Flat field corrector 3" x1
Filter : none
camera : Canon 6D
Film/CCD : Raw
Exp. time : 173x60 seconds, iso1600
Image process tool : AstroImageJ, Fitswork, Irfanview
Processing : demosaic, flat, hot pixel removed by dithering, level, crop, size
Weather : clear
Site : Sweden, Stockholm, Hagsätra
Comment : To get more exposure time I have added older data I took 2 weeks ago to get a total of 3 hour exposure time. The above photo is a crop around the center of the open cluster. Click on it and get the full file field high resolution photo. As you see down to the left I was a bit unlucky and got dust or a hair on the sensor.

NGC 6811, 2019-04-17

NGC 6811, 20190417
Date : 2019-04-17
Time (UT) : 21:57 to 00:14
Mount : EQ6 controlled by EQMOD
Guide : PHD2 in dithering mode, Guide telescope 400 mm f/6.3, camera QHY5
Lens/telescope : TS130, 910mm f/7
Corrector/Barlow : Flat field corrector 3" x1
Filter : none
camera : Canon 6D
Film/CCD : Raw
Exp. time : 90x60 seconds, iso1600
Image process tool : AstroImageJ, Fitswork, Irfanview
Processing : demosaic, flat, hot pixel removed by dithering, level, crop, size
Weather : clear
Site : Sweden, Stockholm, Hagsätra
Comment : A new attempt to catch something different. This is an open cluster that I can reach from our balcony, more to the North. To increase the contrast I need more exposure time to not introduce to much noise.

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