Hemisphere:  Southern  ·  Contains:  M 46  ·  NGC 2437  ·  NGC 2438
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M46 and NGC 2438, 


            Steven Bellavia
M46 and NGC 2438
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M46 and NGC 2438

Technical card

Imaging telescopes or lenses: Celestron C6 SCT

Imaging cameras: ZWO ASI183MC Pro

Mounts: Celestron AVX Mount

Guiding cameras: ASI224MC

Focal reducers: Celestron f/6.3 Focal Reducer

Software: 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  ·  PHD2 Guiding


Accessory: Celestron OAG #93648

Dates:Feb. 5, 2019

Frames:IDAS UIBAR-III: 18x120" (gain: 140.00) bin 1x1

Integration: 0.6 hours

Darks: ~30

Avg. Moon age: 0.56 days

Avg. Moon phase: 0.35%

Bortle Dark-Sky Scale: 4.00

Basic astrometry details

Astrometry.net job: 2601865

RA center: 7h 41' 42"

DEC center: -14° 47' 34"

Pixel scale: 0.490 arcsec/pixel

Orientation: 357.141 degrees

Field radius: 0.393 degrees

Resolution: 4802x3202

Data source: Backyard


Messier 46 is an open cluster of stars in the constellation of Puppis. It was discovered by Charles Messier in 1771. Dreyer described it as "very bright, very rich, very large." M46 is about 4,900 light-years away. There are an estimated 500 stars in the cluster with a combined mass of 450 solar masses, and it is thought to be some 250 million years old.
NGC 2438. a planetary nebula, appears to lie within the cluster near its northern edge, but it is most likely unrelated since it does not share the cluster's radial velocity.



Steven Bellavia
License: None (All rights reserved)

Sky plot

Sky plot


M46 and NGC 2438, 


            Steven Bellavia