Jump to content

Narrowband

IC443 - The Jellyfish Nebula


steppenwolf

Recommended Posts

IC 443 – The Jellyfish Nebula

 

IC443_SHO_2.png.24772fe1ae90bae5e89704c4f5cddad6.png

Introduction

IC 443, also listed in the Sharpless Catalogue as Sh2-248, is a Supernova remnant in the constellation of Gemini. When the massive star at the core of the new nebula fully depleted its thermonuclear fuel, it imploded, forming a neutron star. The outer layers of the star then collapsed inward and then bounced out again in a supernova explosion. The nebula gets its common name from its uncanny resemblance to a jellyfish, complete with tendrils.

The age of the nebula remains uncertain with estimates ranging from 3,000 to 30,000 years – not an exact science then! Its distance from Earth is generally accepted as being 5,000 light years.

The Nebula is rich in Ha and SII emission but less so in OIII so unusually for me, I used the Hubble palette to produce this image and concentrated on getting a good number of OIII subframes under the best atmospheric conditions to ensure that I had sufficient data to help achieve an interesting colour balance against the Ha and SII data.

Image Stats

Mount: Mesu 200
Telescope: Sky-Watcher Esprit 150
Flattener: Sky-Watcher Esprit specific
Camera: QSI 683 WSG-8
Filter: Astrodon 3nm Ha, 3nm OIII and Baader 8nm SII
Subframes: 22 x 1800 sec bin 1x1 Ha, 25 x 1800 sec bin 1x1 OIII, 18 x 900 sec bin 1x1 SII
Integration: 27.5 hours
Control: CCD Commander
Capture: MaxIm DL
Calibration, Stacking and Deconvolution: PixInsight
Post-Processing: PhotoShop PS3

Location

IC443_SHO_CduC.png.8d2780ff45f7b3f50497b9c24df58ba0.png

IC443_Annotated.png.ea5a36740f3372308beb9b7a2d6ea94c.png

Constellation

Gemini

RA

06° 18' 26.0"

DEC

+22° 30' 28.0"

Distance

~5,000ly

 

 

 

  • Like 24
Link to comment
Share on other sites

  • 2 months later...

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.
×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.