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Galaxies
Messier 81 & 82


Object : M81
Coordinates/Direction : RA: 09h55m, DEC: +69o03'
Object size : 26.9' x 14.1'
Object magnitude : 6.94
More to know : Wikipedia:
https://en.wikipedia.org/ wiki/ Messier 81
Object : M82
Coordinates/Direction : RA: 09h55m, DEC: +69o40'
Object size : 11.2' x 4.3'
Object magnitude : 8.41
More to know : Wikipedia:
https://en.wikipedia.org/ wiki/ Messier 82

M81 & M82 2023-09-17

M81 & M82 galaxies, 2023 (Click on image to get the wide angle image in full resolution in a new window)
Date : 2023-09-17
Time (UT) : 23:39 to 00:59
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5 degree, before cropping, 1:1, 800x800 pixel
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 60x60 seconds at ISO1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, flat and photometric color
Weather : clear sky and no Moon
Site : Sweden, Stockholm, Hagsätra Bortle class 9
Comment : Compare this photo with the one below, half the sub exposure time and taken from heavy light polluted sky. Still, not too bad.

M81 & M82 close up 2023-04-15

M81 & M82 galaxy, 2023 Sweden (Click on image to get the wide angle image in full resolution in a new window)
Date : 2023-04-15
Time (UT) : 20:37 to 21:58
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5 degree, before cropping 1:1, 800x800pixel
Filter : none
camera : Canon 6D, controlled by Astroberry software, temperature +9 C degrees
Film/CCD : Raw
Exp. time : 32x120 seconds at ISO1600
Image process tool : Siril, Gimp, Irfanview
Processing : cal dark, flat and photometric color
Weather : clear sky and no Moon
Site : Sweden, Stockholm, Björnö Nature reservation. Bortle class 4
Comment : The central part of the image. With a little more image processing there should be possible to bring out the colors better. Now I'm very eager to get my big APO refractor working again, three times the focal length and almost twice the opening.

M81 & M82 2023-02-19

M81 & M82 galaxies, 2023 (Click on image to get one in full resolution in a new window)
Date : 2023-02-19
Time (UT) : 21:35 to 22:46
Mount : SkyWatcher HEQ5 controlled by Astroberry
Guide : Ekos internal guider in dithering mode, QHY5 camera with 200 mm f/3.5 lens
Lens/telescope : Pentax 645 300 mm ED f/4 (medium format lens)
Corrector/Barlow : -
Field (FOV) : 6.8x4.5 degree, before cropping
Filter : none
camera : Canon 6D, controlled by Astroberry software
Film/CCD : Raw
Exp. time : 30x120 seconds at ISO1600
Image process tool : Siril, Gimp, Irfanview
Processing :  cal dark & flat
Weather : clear sky and no Moon, no white snow on the ground
Site : Sweden, Stockholm, Björnö Nature reservation. Bortle class 4
Comment : This evening it was a perfect clear sky and dark to with no Moon. I only got time to take photos of one object. I choose a galaxy pair, the M81 & M82, objects I don't have a clear view to from the balcony. The clear sky really gave good result, lot of details in the image even if it was shot with only 300 mm focal length. There are even more galaxies, look at the high resolution photo.

M81 & M82 close up 2023-02-19

M81 & M82 galaxy, 2023 Sweden
Date : 2023-04-15
Time (UT) : 21:35 to 22:46
Comment : A crop around the center with its three galaxies, M81, M82 and NGC 3077. Perfect clear sky this night and that give result. Even if the lens is a short 300 mm a lot of details are there. Now I'm eager to get my big refractor rebuilt to this standard. I have already started with that, the focuser is waiting for a driver board.

M81 & M82 2019-01-20

M81 & M82 galaxies, 2019
Date : 2019-01-19
Time (UT) : 17:50 to 18:06
Mount : Skywatcher EQ6 Pro controlled by EQMOD and APT
Guide : PHD2 in dithering mode and guide telescope 400 mm f/6.3 QHY5
Lens/telescope : TS130, 910mm f/7
Corrector/Barlow : Field flattener 3" x1
Field (FOV) : 2.25x1.5 degree, before cropping
Filter : none
camera : Canon 6D, controlled by APT
Film/CCD : Raw
Exp. time : 21x30 seconds at ISO1600
Image process tool : AstroImageJ, Fitswork, Irfanview
Processing : level, cal flat, dithering no bias dark noise filter
Weather : clear with some clouds drifting by
Site : Sweden, Stockholm, Hagsätra. Bortle class 9
Comment : My first photo of these two galaxies, could hardly see them between all obscurations which make it a short exposure time. Down left is a weak galaxy, NGC 3077.

M81 close up 2019-01-19

M81 galaxy, 2019
Date : 2019-01-19
Comment : Need a lot more exposure time on this object, at least one hour.

M82 clos up 2019-01-20

M82 galaxy, 2019
Date : 2019-01-19
Comment : Taken from a darker place and with longer exposure you will see a red streak crossing the galaxy.
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