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Supernova remnant IC 443 (Sh2-248, LBN 844, Jellyfish Nebula) in Gemini

 

SII-Ha-OIII - mapped HST color and RGB to colorize the stars (Click for a larger view 1800 x 1800 px)

 

HaRGB combination-spikes added (Click for a larger view 1800 x 1800 px)

 

LRGB combination - (Click for a larger view 1800 x 1800 px)

 

Nebula in Ha - (Click for a larger view 1800 x 1800 px)

Details

Supernova remnant IC 443 (Sh2-248, LBN 844) - Jellyfish Nebula in Gemini

This beautiful nebula is known more as IC 443 or by the common name of Jellyfish Nebula. IC443 is the Galactic Supernova Remnant (SNR). The Supernova probably occurred 3 000 - 30 000 years ago. The expanding bubble of gas now continues to plow through the interstellar medium. This nebula is comprised of hydrogen, oxygen, silicon, carbon, and iron, which were created through the nuclear fusion process during the predecessor star's lifetime. The same supernova event likely created a neutron star. The bright golden star to the west is Eta Geminorum (Propus). IC 443 is estimated to be some 5 000 light years from Earth.

North is up. The Horizontal FOV is about 110'. The image almost centered at:

Right Ascension 06:16:54.0 (h:m:s)
Declination +22:47:00 (deg:m:s)
Distance 5 (kly)
Brightness -
Apparent Dimension

50 x 40 (arc min)

Seeing: Pickering 7 rating - Good
Optic(s): APO 90/600+WO field flatener @ f/4.9
Mount: CGE equatorial
Camera: Artemis Art 4021 - monochrome CCD camera – 2048 x 2048 px ; 16x16 mm; 7.4 µm x 7.4 µm
Filters: Astronomik Ha, OIII, SII, L, R, G, B set, Truetek Computerized Filter Wheel
Dates/Times: 2011-11-03
Location: Rozhen Observatory, BG, longitude: E 24 44' 18", latitude: N 41 41' 42"
Exposure Details:

Ha = 50 min, OIII = 50 min, SII = 50 min, L = 30 min (Bin 1), R = 30 min, G = 30 min, B = 30 min (Bin2) Subexposures: HaOIIISII = 10 min, LRGB = 5 min, Total Exposure Time - 270 min

More details: Dark frames reduction
Guiding: Starlight Xpress Lodestar Autoguider on Celestron 11" Schmidt Cassegrain
Processing:

PixInsight / PS

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All Contents copyright Velimir Popov unless otherwise noted.