M 47 - Open Cluster in Puppis



M 47 is an open star cluster located in the constellation of Puppis. It was discovered by Giovanni Batista Hodierma in 1654 and was re-discovered by Charles Messier in 1771.

The cluster is 78 thousand years old and and contains 50 stars. It lies 1,600 light years away and covers 30 arcsec in the sky, approximately the size of a full moon. At a magnitude of 4.2, it is visible to the naked eye under dark skies.


Telescope: Astro-Tech RC-8
Camera: Modified Canon 650D (T4i); ISO 1600
Mount:  iOptron CEM60
Guiding: QHY 5L-II on 60mm guide scope
Exposures: 12 @ 5min.

Images were focused using the camera's live view and a Bahtinov mask. Exp

Taken from my backyard observatory in southeastern Minnesota on 3/23/23.

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