| 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 |
| 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. |
| 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. |
| 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. |
| 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. |
| 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. |
| Date : | 2019-01-19 |
| Comment : |
Need a lot more exposure time on this object, at least one hour. |
| Date : | 2019-01-19 |
| Comment : |
Taken from a darker place and with longer exposure you will see a red streak crossing the galaxy. |
English
(Click on image to get the wide angle image in full resolution in a new window)
(Click on image to get the wide angle image in full resolution in a new window)
(Click on image to get one in full resolution in a new window)
