Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  M 94  ·  M94  ·  NGC 4736
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M94 - Croc’s Eye Galaxy (HaLRGB), 


            Frank Breslawski
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M94 - Croc’s Eye Galaxy (HaLRGB)

Imaging telescopes or lenses: Lacerta Newton ohne Namen 250/1200

Imaging cameras: Astrel Instruments AST16200B

Mounts: EQ8

Guiding cameras: ZWO ASI 174MM Mini

Software: PixInsight 1.8

Filters: Astronomik Deep-Sky B  ·  Astronomik Deep-Sky G  ·  Astronomik Deep-Sky R  ·  Astronomik H-Alpha 6nm CCD  ·  Astronomik L-2 UV-IR Block

Accessory: GPU Pal Gyulai GPU 2" Aplanatic Coma Corrector  ·  ZWO Off Axis Guider

Dates:March 26, 2020March 27, 2020March 31, 2020

Astronomik Deep-Sky B: 12x300" -20C bin 1x1
Astronomik Deep-Sky G: 12x300" -20C bin 1x1
Astronomik Deep-Sky R: 12x300" -20C bin 1x1
Astronomik H-Alpha 6nm CCD: 30x600" -20C bin 1x1
Astronomik L-2 UV-IR Block: 93x300" -20C bin 1x1

Integration: 15.8 hours

Darks: ~50

Flats: ~10

Bias: ~200

Avg. Moon age: 3.71 days

Avg. Moon phase: 17.64%

Bortle Dark-Sky Scale: 4.00

Astrometry.net job: 3657834

RA center: 12h 50' 49"

DEC center: +41° 7' 42"

Pixel scale: 1.034 arcsec/pixel

Orientation: -142.736 degrees

Field radius: 0.437 degrees

Resolution: 2344x1944

Locations: Home, Bergisches Land, Germany

Data source: Backyard


The data aquisition for Messier 94 (Croc’s Eye Galaxy or also Cat's Eye Galaxy) was already done in this years' galaxy-time around March.

I had a few very clear and dark nights, which had a very positive effect on the image data. During the processing I was very happy to see how well the outer, faint halo of the galaxy appeared. Even very fine parts of emission nebulae (reddish H-Alpha) can be seen in the halo.

Messier objects are generally very bright, but M94 with all its great details in the core down to its fine extensions surprised me very positively. :-)


Sky plot

Sky plot


M94 - Croc’s Eye Galaxy (HaLRGB), 


            Frank Breslawski