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Contains:  NGC 2438, M 46, NGC 2437
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M46 and NGC 2438, 





    
        

            Steven Bellavia
M46 and NGC 2438

M46 and NGC 2438

Technical card

Resolution: 4802x3202

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

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

Data source: Backyard

Description

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.

Comments

Author

bellavia
Steven Bellavia
License: None (All rights reserved)
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M46 and NGC 2438, 





    
        

            Steven Bellavia