English
|
Advertisement / Annons: |
Galaxies |
| Object : | NGC 4236 |
| Coordinates/Direction : | RA: 12h16m, DEC: +69o27' |
| Object size : | 21.9' x 7.2' |
| Object magnitude : | 10.5 |
| More to know : |
Wikipedia: https://en.wikipedia.org/ wiki/ NGC_4236 |
NGC 4236 2024-11-22
|
| Date : | 2024-11-22 |
| Time (UT) : | 21:58 to 23:14 |
| Mount : | SkyWatcher EQ6 Pro, beltdrive modified (DIY 2019) |
| Guide : | ASI120 camera with off-axis |
| Lens/telescope : | Pentax 645 FA 300 mm ED f/4 (medium format lens) |
| Corrector/Barlow : | - |
| Field (FOV) : | 6.8x4.5o (full frame) before crop |
| camera : | Nikon D800, QE=0.56, full frame, 36 Mpixel, 14 bit |
| camera temperature: | - , no temperature sensor |
| Film/CCD : | Raw, NEF |
| Filter : | none |
| Control system: | Mount, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux, 64-bit) |
| Exp. time : | 59x30 seconds at ISO400, dithering every 3rd image |
| Image process tool : | Siril, Fitswork, Irfanview |
| Processing : | flat, photo metric color calibration, crop 760x717 pixel 1:1 scale |
| Weather : | Moon phase 56%, clear sky, temperature -8o C |
| Site : | Sweden, Stockholm, Hagsätra.
Bortle 9 Free view Az: 20o to 90o, 165o to 185o, Alt: 20o to 55o |
| Comment : | A test on this galaxy once again, now with the Nikon camera and the FA lens. But from a Bortle 9 area this weak galaxy is hopeless. |
NGC 4236 2022-03-04
(click on the image to get a full resolution photo in a new window)
|
| Date : | 2022-03-04 |
| Time (UT) : | 23:10 to 23:05 |
| Mount : | SkyWatcher HEQ5, belt modified, low rider |
| Guide : | 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) : | 6.8x4.5o (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, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux) |
| Exp. time : | 30x30 seconds at ISO1600, dithering mode |
| Image process tool : | Siril, Fitswork, Irfanview |
| Processing : | level, cal bias dark flat, dithering |
| Weather : | clear sky |
| Site : | Sweden, Stockholm, Hagsätra.
Bortle 9 Free view Az: 20o to 90o, 165o to 185o, Alt: 20o to 55o |
| Comment : | More test on the roof balcony, much better view from here compare to our balcony. The hole Western hemisphere is open for me. Most important I can view objects at high latitude. Now with more photos to stack and later at night I got a more darker sky and the galaxy is easier to see. |
NGC 4236 2022-01-21
(click on the image to get a full resolution photo in a new window)
|
| Date : | 2022-01-21 |
| Time (UT) : | 18:56 to 19:14 |
| Mount : | SkyWatcher HEQ5, belt modified, low rider |
| Guide : | 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) : | 6.8x4.5o (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, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux) |
| Exp. time : | 8x30 seconds at ISO1600, dithering mode |
| Image process tool : | Siril, Fitswork, Irfanview |
| Processing : | level, cal bias dark flat, dithering |
| Weather : | clear sky |
| Site : | Sweden, Stockholm, Hagsätra, terrace at 9t floor.
Bortle 9 Free view Az: 165o to 15o, Alt: 5o to 90o |
| Comment : | Just a few images to stack to see if there is any trace of the galaxy, and yes you can see it but not more. |
|
| Go Back |