Three Gas Shells of NGC 2438

Three Gas Shells of NGC 2438

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I was quite surprised when not just two but three gas shells were captured after 6 hours of hydrogen alpha exposures in this image of planetary nebula NGC2438! I decided to do a long Ha exposure after I noticed hints of a second outer shell in a red POSS2 image. The magnitude 10 planetary nebula is in the foreground of M46, a beautiful open star cluster in the constellation Puppis.

An earlier image by Don Goldman that captured the second gas shell can be found here: http://dg-imaging.astrodon.com/gallery/display.cfm?imgID=206

Three Gas Shells of NGC 2438

Click image to view the highest image resolution

Three Gas Shells of NGC 2438

Click image to view the highest image resolution



Coordinates       :

07h 42' -14d 46'

Date Imaged       :

March 10, 2011

Lens       :

N16 f/5.2

Camera       :

SBIG ST10xme

Exposure       :

8 hours

Filter       :

Astrodon HaRGB 360:42:30:46 minutes

Mount       :

Losmandy Titan

Location       :

Stardust Observatory, Baguio