# Ic443 nf c shorgb 2218m+823m+666m+729m 2218m 37h

- By: Ram samudrala
- Date: 2021-03-18
- Classification: Photograph
- Museum: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Ic443_nf_c_shorgb_2218m%2B823m%2B666m%2B729m_2218m_37h.jpg)
- Rights: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0)
- Picture: https://upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Ic443_nf_c_shorgb_2218m%2B823m%2B666m%2B729m_2218m_37h.jpg/1920px-Ic443_nf_c_shorgb_2218m%2B823m%2B666m%2B729m_2218m_37h.jpg
- Who can see it: Kids profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)

Jellyfish nebulae also includes Eta Geminorum/Propus, Mu Geminorum/Tejat, and LDN1564-LDN1568.

Total integration: 2218 minutes/37 hours (137/19 x 300/420s or 13.7h for Ha + 94/28 x 300/420s or 11.1h for O3 + 94/35 x 300/420s or 12.2h for S2).

Cameras: QHY163M (16mp mono) and QHY247C (24mp OSC) CMOS cooled to -20 and -15 degrees C. Telescopes: Takahashi FC100DF Steinheil fluorite doublet and Stellarvue SV70T triplet apochromat refractors @ f/4.9 and @ f/4.8. Reducers: Takahashi FC-35 (0.66x) and SFFR70-APO (0.8x). Mount: Paramount MyT. Filters: 1.25" Astrodon 5nm Ha, 3nm O3, 3nm S2 and 2" Baader UV-IR-Cut Software: TheSkyX Pro, SharpCap, PixInsight, Topaz Studio 2.

http://ram.org/ramblings/cosmos/

The Jellyfish nebula (IC443) is the name given to a galactic supernova remnant situated in the constellation Gemini about 5000 light years from Earth. The remains of a supernova that exploded prior to the dawn of the Julian and Gregorian calendars is coincidentally bookended by two bright stars in the frame, Eta Geminorum aka Propus/Praepus/Tejat Prior on the right and Mu Geminorum aka Tejat/Calx on the left side.

The narrowfield framing shows the partial shell of supernova remnant…