Hemisphere:  Northern  ·  Constellation: Canes Venatici (CVn)  ·  Contains:  M 94  ·  NGC 4736
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M94, The two-ringed galaxy in Canes Venatici, 



    
        

            Steven Bellavia
M94, The two-ringed galaxy in Canes Venatici
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M94, The two-ringed galaxy in Canes Venatici

Getting plate-solving status, please wait...
M94, The two-ringed galaxy in Canes Venatici, 



    
        

            Steven Bellavia
M94, The two-ringed galaxy in Canes Venatici
Powered byPixInsight

M94, The two-ringed galaxy in Canes Venatici

Technical card

Imaging telescopes or lenses: TS-Optics PHOTOLINE 115 mm F7 triplet apo

Imaging cameras: ZWO ASI533MC Pro

Mounts: Sky-Watcher EQ-6R Pro SynScan

Guiding telescopes or lenses: The Bellavia Basic-II 50mm f/7.5 guidescope

Guiding cameras: ZWO ASI 290MC

Focal reducers: TS-Optics TSRed279 0,79 Reducer

Software: Pleiades Astrophoto PixInsight  ·  IDEIKI AstroPhotography Tool (APT)  ·  Stark Labs Nebulosity 4.2  ·  Annie's Astro Actions V7  ·  Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions  ·  SharpCap Pro 3.2


Dates:March 19, 2021

Frames:Astronomik L2 UV/IR Cut: 90x180" (4h 30') (gain: 100.00) -5C bin 1x1

Integration: 4h 30'

Darks: ~30

Flats: ~30

Flat darks: ~30

Avg. Moon age: 5.50 days

Avg. Moon phase: 30.46%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 20.50

Mean FWHM: 3.00

Temperature: -1.00


Basic astrometry details

Astrometry.net job: 4329660

RA center: 12h 50' 55"

DEC center: +41° 7' 26"

Pixel scale: 1.193 arcsec/pixel

Orientation: 90.919 degrees

Field radius: 0.373 degrees


Resolution: 1800x1350

Data source: Traveller

Description

M94, NGC 4736, is a spiral galaxy located 16 million light-years away in the constellation Canes Venatici. It was discovered by Pierre Méchain in 1781, and catalogued by Charles Messier two days later. Although some references describe M94 as a barred spiral galaxy, the "bar" structure appears to be more oval-shaped.

M94 has two ring structures with an inner ring  5,400 light-years in diameter and an outer ring with a diameter of 45,000 light-years. These rings appear to form at resonance points in the disk of the galaxy. The inner ring is the site of strong star formation activity and is sometimes referred to as a starburst ring. This star formation is fueled by gas driven dynamically into the ring by the inner oval-shaped bar-like structure.

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M94, The two-ringed galaxy in Canes Venatici, 



    
        

            Steven Bellavia