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History
IC 443
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IC 443 is a galactic supernova remnant (SNR) in the constellation Gemini. On the plane of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth.
Part of the northeastern shell of IC 443, aka the Jellyfish Nebula
Part of the northeastern shell of IC 443, aka the Jellyfish Nebula
WISE image of IC 443
WISE image of IC 443
IC 443 wide field image. The stars η (right) and μ (left) Geminorum, the diffuse emission from S249 (north), and the G189.6+3.3 partial shell (center)
IC 443 wide field image. The stars η (right) and μ (left) Geminorum, the diffuse emission from S249 (north), and the G189.6+3.3 partial shell (center) are visible.
Sharpless catalog
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The Sharpless catalog is a list of 313 H II regions intended to be comprehensive north of declination −27°. The first edition was published in 1953 with 142 objects (Sh1), and the second and final version was published by US astronomer Stewart Sharpless in 1959 with 312 objects. Sharpless also includes some planetary nebulae and supernova remnants, in addition to H II regions.
Sharpless catalog
Sharpless catalog
Image: NGC 6302HST
Image: NGC 6302HST
Image: NGC 6334
Image: NGC 6334
Image: Emission Nebula NGC6357
Image: Emission Nebula NGC6357