IC 443 and Sh2-249
In the lower right of this image lies IC443 or the Jellyfish Nebula. It is the beautiful remnant of a supernova explosion thought to have occurred about 35,000 years ago. A neutron star lies buried deeply within the nebula and is all that remains of the original star. A large emission nebula takes up the left side of the image. Within this nebula - visible near the top and to the left of center is the recently discovered planetary nebula Howell-Crisp 1 (HoCr1). In this image the nebula is small, not much larger that the stars and appears as a faint aqua colored spot. The two brightest stars are Mu and Eta Geminorum.
This image is a 2 panel mosaic and was taken through hydrogen alpha, sulfur II and oxygen III filters.
OTA: William Optics Star71
Camera: Atik 460ex w/EFW2 filter wheel
Filters: Astrodon Ha/SII/OIII (3nm)
Mount: AP Mach1
Exposure: Ha:SII:OIII 220:200:160m (total both panels)
Data obtained: February 2015 / March 2016