a. v. ley
IC 443 Jellyfish Nebula 1K CW
IC 443 – The Jellyfish Nebula
IC 443 is a supernova remnant found in the direction of the constellation Gemini. It is thought that the supernova occurred sometime between 3,000 and 30,000 years ago. There is no known record of this supernova. The object is approximately 50 arc-minutes across and is thought to be about 5,000 light-years away.
Captured on 1-16-21 from the General Nathan Twinning Observatory (the dark sky site of the Albuquerque Astronomical Society) and 2-6-21 from my light-polluted Albuquerque backyard, using 7 nm band pass Sii, Halpha and Oiii filters on an ASI 1600mm camera, attached to an AT65 refractor mounted on a Losmandy G11 mount, this is at least my third attempt on this object. Previous attempts, made in RGB with OSC cameras have failed to yield satisfactory images. 36 x 300” subframes were captured in Sii, Halpha and Oii, for a total of 9 hours of data. All files were calibrated with darks, bias and flats, aligned and combined in PixInsight. I still found it somewhat difficult to obtain a finished image that I was satisfied with. One problem is the brightness of the stars Propus and μ Geminorum. In retrospect, I probably should have made separate images of much shorter duration and blended those into the final image. Nevertheless, this is by far the best image I’ve managed to make of this object.
IC 443 Jellyfish Nebula 1K CW
IC 443 – The Jellyfish Nebula
IC 443 is a supernova remnant found in the direction of the constellation Gemini. It is thought that the supernova occurred sometime between 3,000 and 30,000 years ago. There is no known record of this supernova. The object is approximately 50 arc-minutes across and is thought to be about 5,000 light-years away.
Captured on 1-16-21 from the General Nathan Twinning Observatory (the dark sky site of the Albuquerque Astronomical Society) and 2-6-21 from my light-polluted Albuquerque backyard, using 7 nm band pass Sii, Halpha and Oiii filters on an ASI 1600mm camera, attached to an AT65 refractor mounted on a Losmandy G11 mount, this is at least my third attempt on this object. Previous attempts, made in RGB with OSC cameras have failed to yield satisfactory images. 36 x 300” subframes were captured in Sii, Halpha and Oii, for a total of 9 hours of data. All files were calibrated with darks, bias and flats, aligned and combined in PixInsight. I still found it somewhat difficult to obtain a finished image that I was satisfied with. One problem is the brightness of the stars Propus and μ Geminorum. In retrospect, I probably should have made separate images of much shorter duration and blended those into the final image. Nevertheless, this is by far the best image I’ve managed to make of this object.