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Galaxy
Messier 94


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

Gakaxy M94, 2024 (Click at image and get a high resolution in a new window)
Date : 2024-02-23
Time (UT) : 18:58 to 20:05
Mount : SkyWatcher EQ6 Pro, 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-90o, 165o-185o, La: 20o-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

Gakaxy M94, 2023
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-90o, 165o-185o, La: 20o-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

Gakaxy M94, 2023
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

Gakaxy M94, 2019
Date : 2019-03-29
Time (UT) : 20:31 to 21:05
Mount : SkyWatcher EQ6 Pro, 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-90o, 165o-185o, La: 20o-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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