deep-sky
nebula (supernova remnant)
IC 443 – The Jellyfish Nebula
IC443 is a supernova remnant in the constellation Gemini at a distance of about 5.000 ly. The supernova occurred somewhere between 3.000 and 30.000 years ago.
IC443 is also known as the Jellyfish nebula due to it’s shape. The actual size of the nebula is around 70 ly.
The large star on the left near the nebula is η Geminorum, the other bright star is μ Geminorum.
IC444, a small (blue) reflection nebula surrounding the star 12Gem. is just below the center of the image.
The lanes of dark nebulosity are known as LDN 1567 and LDN 1568.
When looking carefully at lower right of the image, you may notice a small somewhat brighter “bubble”, this is Howell-Crisp 1, which is suspected to be a small planetary nebula only to be discovered in 2006. Check the annotated version listed below if you cannot find it.
Other / older versions :
Image information:
Object info
Name: IC 443 – The Jellyfish Nebula
Type: Nebula (supernova remnant)
Constellation: Gemini
Distance: 5000 ly
Date & location
Date: January 23, 2017
Location: Landgraaf, The Netherlands
Equipment & optics
Total integration: 8h25m
Camera: SBIG ST-8300M
Optics: TMB/LOMO 80/480
Mount: Losmandy G-11 Gemini
Image comments
Imaging conditions were not good.
Cold winter nights, with slight snow cover, no wind and high humidity.
Images taken over 3 nights. Struggling with flats for Ha, current flats seem to make image worse.
Need to check methodology and find a solution to the issue.
