Messier 46. NGC 2437

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Messier 46 is a relatively old open cluster, with an estimate age of about 300 million years. Located in the southern constellation Puppis, it is about 5400 light years away. At about half that distance (2900 light years), NGC 2438, a conspicuous planetary nebula, appears superimposed to the background cluster. In this image, the planetary nebula has been captured with narrowband filters (Ha and OIII). Containing about 500 stars, this cluster lies in an area having also other well known deep-sky objects, like M47 or NGC 2359 (the Thor’s Helmet).


Additional Information


Name(s): Messier 46. M46. NGC 2437

Type: Open Cluster

RA:  07h 41m 45s

Dec: -14º 48’ 03”

Constellation: Puppis

Size (arcmin): 20×22 arcmin

Magnitude: +6.1

Distance: 5400 ly


Date: 2021-01-23 to 2021-02-08

Location:, SSO near Coonabarabran, NSW Australia

Size (arcmin): 37×37 arcmin

Telescope: 17” f/6.8 Reflector

Camera: FLI PL16803 (4096x4096pix)

Guiding: Astrodon MonsterMOAG off-axis guider

Total exposure: 6h 10m (L: 1h; RGB: 2h; Ha: 1h 50m; OIII: 1h 20m)

Processing: CCDStack, Photoshop CC 2021

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