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Galaxy |
| Object : | M94 |
| Coordinates/Direction : | RA: 12h50m, DEC: +41o07' |
| Object size : | 11' x 9' |
| Object magnitude : | 8.99 |
| More to know : |
Wikipedia: https://en.wikipedia.org/ wiki/ Messier 94 |
M94 2024-02-23, crop
(Click at image and get a high resolution in a new window)
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| Date : | 2024-02-23 |
| Time (UT) : | 18:58 to 20:05 |
| Mount : | SkyWatcher EQ6 Pro, Belt drive, 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, camera, focus, guide (Ekos) controlled by Astroberry (KStars/Ekos Linux) |
| Exp. time : | 28x120 seconds, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | bias, flat and astrometric color calibrated, crop 800x800 pix 1:1 scale |
| Weather : | clear, full Moon, temperature +3o C |
| Site : | Sweden, Stockholm, Hagsätra.
Bortle 9 Free view Az: 20o to 90o, 165o to 185o, Alt: 20o to 55o |
| Comment : | The core of this galaxy is bright and got over exposed with 120 seconds exposure time. The inner weak spiral arms are only some trace of. Compare with the photos in the Wikipedia page above, the spiral arms reach all the way out to the three bright stars. I guess that a night without moon shine and 200x 60 seconds hade given much better result. |
M94 2023-01-03
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| Date : | 2023-01-03 |
| Time (UT) : | 23:22 to 00:02 |
| 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 : | 30x60 seconds, iso1600, dithering mode |
| Image process tool : | Siril, Gimp, Irfanview |
| Processing : | cal dark, flat |
| Weather : | clear |
| Site : | Sweden, Stockholm, Hagsätra.
Bortle 9 Free view Az: 20o to 90o, 165o to 185o, Alt: 20o to 55o |
| Comment : | This night I planning to take photos of the comet ZTF. But I have to wait to 3 am in the morning. The time before I use to take photos of the galaxy M 94. It's four years since I took a photo of it. In that time I used my big TS130 refractor, even with that one the galaxy isn't big in the view. Now I only have a tiny 300 focal lens, 1/3 of the telescope. Will I see anything of the galaxy ? The galaxy is the little bright dot in center. |
Crop around the galaxy M94 2023-01-03
|
| Date : | 2023-01-03 |
| Time (UT) : | 23:22 to 00:02 |
| Comment : | If I crop the photo to 1:1 pixel scale it's easier to see that it's a galaxy. Pretty well when in mind the small telescope I use and from the light polluted environment. |
M94 2019-03-29
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| Date : | 2019-03-29 |
| Time (UT) : | 20:31 to 21:05 |
| Mount : | SkyWatcher EQ6 Pro, Belt drive, 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 : | 24x60 seconds, iso1600, dithering mode |
| Image process tool : | AstroImageJ, Fitswork, Irfanview |
| Processing : | demosaic, no cal dark&bias, only dithering median stacking, flat cal, crop, level, gamma |
| Weather : | clear |
| Site : | Sweden, Stockholm, Hagsätra.
Bortle 9 Free view Az: 20o to 90o, 165o to 185o, Alt: 20o to 55o |
| Comment : | M94 is a galaxy discovered 1781 by the French astronomer Pierre Mechain. It needs a lot of more exposure, many hours and longer focal length. Interesting to see the weak halo around the arms of the galaxy, it's also arms of the galaxy. |
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