Taken 30-Jul-16
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Dimensions3319 x 2497
Original file size907 KB
Image typeJPEG
Color spaceUncalibrated
SH 2-248

SH 2-248

Other Names: IC 443, Jellyfish Nebula
Optics: Borg 101ED at f/4.1
Mount: Paramount MX using The SkyX Pro
Camera: QSI 683WS-8
Filters: Astrodon Ha 3nm, OIII 3nm, SII 3nm
Exposure: 2440 Mins or 40 2/3 hours, [24 2/3 Ha, 8 1/3 OIII, 5 2/3 SII], Binned 1x1, 1800s exposures
Accessories: Auto guided with Borg 45ED & Starlight Xpress Lodestar. Feathertouch focuser using FocusMax 3.8.0
Location: Burlington, ON
Date: Taken over several nights and several months from October 23rd, 2015 to April 29th, 2016
Notes: Image acquisition with Maxim DL Pro using MaxPilote automation software.
Processing: Image calibration, align, and combine in Maxim DL Pro. Levels, curves, cosmetic adjustments and crop/resize in Photoshop.
Calibrated w/20 Darks, 100 Bias, 50 Flats of each filter using a flat pannel. CCD temperature was -25C. Image was taken from my backyard Observatory.

Published in Sky & Telescope: http://astromarina.zenfolio.com/p498178330/heca0746#heca0746

Link to Ha image: http://astromarina.zenfolio.com/p264248004/h7644d2f0#h7644d2f0

IC 443 (also known as the Jellyfish Nebula and Sharpless 248 (Sh2-248)) is a Galactic supernova remnant (SNR) in the constellation Gemini. On the plan of the sky, it is located near the star Eta Geminorum. Its distance is roughly 5,000 light years from Earth.
IC 443 may be the remains of a supernova that occurred 3,000 - 30,000 years ago. The same supernova event likely created the neutron star CXOU J061705.3+222127, the collapsed remnant of the stellar core. IC 443 is one of the best-studied cases of supernova remnants interacting with surrounding molecular clouds.