Hemisphere:  Northern  ·  Contains:  NGC 4120  ·  NGC 4236
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Galaxy Caldwell 3, NGC 4236, 


            Steven Bellavia
Galaxy Caldwell 3, NGC 4236
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Galaxy Caldwell 3, NGC 4236

Technical card

Imaging telescopes or lenses: Celestron C6 SCT

Imaging cameras: ZWO ASI183MC Pro

Mounts: Celestron AVX Mount

Focal reducers: Starizona Hyperstar

Software: Pleiades Astrophoto PixInsight  ·  IDEIKI AstroPhotography Tool (APT)  ·  Stark Labs Nebulosity 4.2  ·  Digital Photo Professional  ·  Annie's Astro Actions V7  ·  Noel Carboni's Astro Tools for PhotoShop Noel Carboni Actions  ·  SharpCap Pro 3.1

Filters: Astronomik L2 UV/IR Cut

Dates:May 21, 2019

Frames:Astronomik L2 UV/IR Cut: 82x60" (gain: 83.00) -15C bin 1x1

Integration: 1.4 hours

Darks: ~20

Flats: ~30

Flat darks: ~30

Avg. Moon age: 17.39 days

Avg. Moon phase: 92.40%

Bortle Dark-Sky Scale: 4.00

Mean SQM: 20.50

Mean FWHM: 7.00

Temperature: 10.00

Basic astrometry details

Astrometry.net job: 2705682

RA center: 12h 16' 43"

DEC center: +69° 27' 46"

Pixel scale: 1.761 arcsec/pixel

Orientation: 179.354 degrees

Field radius: 0.957 degrees

Resolution: 3300x2100

Data source: Backyard


This is another unusual, often overlooked galaxy. Caldwell 3, NGC 4236 is a barred spiral galaxy located in the constellation Draco.
The galaxy is a member of the M81 Group of galaxies.The group contains the spiral galaxy Messier 81 and the starburst galaxy Messier 82. NGC 4236 is located away from the central part of the M81 group at a distance of is 14.5 Mly from Earth.



Steven Bellavia
License: None (All rights reserved)

Sky plot

Sky plot


Galaxy Caldwell 3, NGC 4236, 


            Steven Bellavia