M46 - Open Cluster in Puppis
M46 is also known as NGC2437. This image was selected as
Astronomy Magazine Picture Of the Day for February 08, 2008.
Two planetary nebulas can be seen in the full resolution view above. They are NGC2438 and PLN231+4.1.
NGC2438 is listed at magnitude 10.8. PLN231+4.1 is listed at magnitude 14.4.