M46 (Doug Summers)

Celestial hemisphere: Southern · Constellation: Puppis (Pup) · Contains: M 46 · NGC 2437 · NGC 2438

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M46

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M46

Messier 46 has always been a favorite visual open cluster due to the presence of the small planetary NGC 2438 superimposed on the field. From Wikipedia, the cluster has on the order of 500 stars, is about 5K light years distant, and is roughly 250 million years young. I captured many more frames than are presented here. I down-selected about 1/2 of the frames to keep the FWHM respectable (given the object's lower altitude). At f/2.2, I think this exposure level seems about right.

Note that the Calabash Nebula is about 4 planetary widths to the right in the field. Only a small, very red elongation is visible in this image. Enjoy.

Original
B
Final
C

B

Description: A bit of decon on the planetary, plus a tighter crop

Uploaded: ...

C

Description: SPCC, BXT, and GHS reprocessing, with a slightly increased crop.

Uploaded: ...

Celestron RASA
The OSC Club (One Shot Camera)

Messier Objects
Planetary Nebulae
Star Clusters
z-Chiricahua Astronomy Complex

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Status	Basic success
Started	...
Astrometry.net job	7178877
PixInsight job	n/a
PixInsight queue size	n/a
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