Contains:  M 46, NGC 2437
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M46, 





    
        

            Roberto Marinoni
M46

M46

Technical card

Resolution: 4308x3414

Dates:Jan. 12, 2018

Frames:
Baader Blue 2": 8x300" -20C bin 1x1
Baader Green 2": 8x300" -20C bin 1x1
Baader Red 2" : 8x300" -20C bin 1x1

Integration: 2.0 hours

Darks: ~15

Flats: ~15

Flat darks: ~15

Avg. Moon age: 25.43 days

Avg. Moon phase: 17.88%

Mean SQM: 21.00

Astrometry.net job: 1918623

RA center: 115.393 degrees

DEC center: -14.789 degrees

Pixel scale: 1.362 arcsec/pixel

Orientation: 271.951 degrees

Field radius: 1.040 degrees

Locations: Promiod, Aosta, Val d'Aosta, Italy

Data source: Own remote observatory

Description

M46 is a rich open star cluster in Puppis constellation.
Inside the cluster it is visible a small planetary nebula, NGC 2438: but in reality this is only for a perspective effect, because M46 has a distance of 5400 light years, while NGC 2438 has a distance of 2900 light years.
On the image it is visible also another very faint planetary nebula, PK231+4.1, with magnitude 14.4: you can see it at about the half distance between NGC 2438 and the right side of the image.

Comments

Author

Bluesky71
Roberto Marinoni
License: None (All rights reserved)
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M46, 





    
        

            Roberto Marinoni

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