Tag Archives: IC443

IC443 in HaOIII and RGB

5851bd20646f2d3d8d207798aa2a1e6f.1824x0_q100_watermark_watermark_opacity-3_watermark_position-6_watermark_text-Copyright Petko Marinov

IC 443 (also known as the Jellyfish Nebula and Sharpless 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 is an extended source, having an angular diameter of 50 arcmin (by comparison, the full moon is 30 arcmin across). At the estimated distance of 5,000 ly (1,500 parsec) from Earth, it corresponds to a physical size of roughly 70 light years (20 parsec).

The SNR optical and radio morphology is shell-like (e.g. a prototypical shell-like SNR is SN 1006), consisting of two connected sub-shells with different centers and radii. A third larger sub-shell, initially attributed to IC 443, is now recognized as a different and older (100,000 years) SNR, called G189.6+3.3.
Notably, IC 443 X-ray morphology is centrally peaked and a very soft X-ray shell is barely visible. Unlike plerion remnants, e.g. the Crab Nebula, the inner X-ray emission is not dominated by the central pulsar wind nebula. It has indeed a thermal origin. IC 443 shows very similar features to the class of mixed morphology SNRs. Both optical and X-ray emission are heavily absorbed by a giant molecular cloud in the foreground, crossing the whole remnant body from northwest to southeast.

Imaging telescopes or lenses: Selfmade Super Astrograph 8″ f4
Imaging cameras: SBIG ST- 8300M
Mounts: Skywatcher AZ EQ6 GT
Guiding telescopes or lenses: Selfmade Super Astrograph 8″ f4
Guiding cameras: ALccd5-IIm
Software: Fitswork, Adobe Photoshop CS5
Filters: Baader Planetariun Ha 7nm, Baader Planetarium Blue 1.25″, Baader Planetarium Green 1.25″, Baader Planetarium Red 1.25″, Baader Planetariun OIII 8.5nm
Accessories: TS 9mm OAG, Pal Gyulai Komakorrektor
Dates: Feb. 21, 2014
Frames:
Baader Planetarium Blue 1.25″: 2×600″ bin 2×2
Baader Planetarium Green 1.25″: 2×600″ bin 2×2
Baader Planetariun Ha 7nm: 6×900″
Baader Planetariun OIII 8.5nm: 7×600″ bin 2×2
Baader Planetarium Red 1.25″: 2×600″ bin 2×2
Integration: 3.7 hours

Author: Petko Marinov

16 March 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.

IC443 The Jelly Fish Nebula

f64afd43a41879e6c0be48333454f8a6.1824x0_q100_watermark_watermark_opacity-10_watermark_position-6_watermark_text-Copyright Chris Madson
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.

Imaging telescopes or lenses: Orion ED80
Imaging cameras: SBIG ST-10 XME
Mounts: Mountain Instruments MI-250
Guiding telescopes or lenses: Orion ED80
Guiding cameras: Starlight Xpress Lodestar
Software: Main Sequence Software Sequence Generator Pro, PHD guiding, PixInsight, photoshop, Foster Systems Astro Alert, Foster Systems AstroMC
Filters: Astrodon Ha 5nm, Astrodon SII 5nm, Astrodon 6nm OIII
Accessories: Astro-Tech 2″ Field Flattener, Orion Thin Off Axis Guider, SBIG CFW 10, Moonlite CF 2″ focuser with high resolution stepper
Dates: Jan. 19, 2014, Feb. 1, 2014, Feb. 2, 2014
Locations: Bone Yard
Frames:
Astrodon 6nm OIII: 9×600″ -25C bin 1×1
Astrodon Ha 5nm: 9×600″ -25C bin 1×1
Astrodon SII 5nm: 9×600″ -25C bin 1×1
Integration: 4.5 hours
Darks: ~20
Bias: ~100

Autor: Chris Madson

AstroPhotography of the day by SPONLI

10 February 2014

We select the best works of amateur astrophotographers with details of equipment, shooting processing etc.