Celestial hemisphere:  Northern  ·  Constellation: Gemini (Gem)  ·  Contains:  7 Gem)  ·  Gem A  ·  IC 443  ·  Praepes (η Gem  ·  Tejat Prior  ·  The star Propus
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IC 443, Jellyfish Nebula, UHC-S, 25 Feb 2014, David Dearden
IC 443, Jellyfish Nebula, UHC-S, 25 Feb 2014
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IC 443, Jellyfish Nebula, UHC-S, 25 Feb 2014

Equipment

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Acquisition details

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Description

The Jellyfish is easy to find as it is near an easily-visible star, Propus. Conditions are excellent tonight, but I had trouble balancing the scope. I'm trying 480-s subframes, as the 300 I used last year didn't seem long enough. CCD at 10 °C. I may want to process this more/differently later, but here's a first attempt.

In the revision, I just darkened the background to cut down some of the noise, and did not apply the "increase star color" action; I think there's already plenty of color without that.

Date: 25 Feb 2014

Subject: IC 443, Jellyfish Nebula

Scope: ST80+Antares 0.5x telereducer

Filter: Baader UHC-S

Mount: CG-5 (Synta motors), PIC controller

Guiding: 9x50 Finder/Guider + DSI Ic + PHD 2.2.1

Camera: DSI IIc (no chiller, T = 10-0 °C)

Acquisition: Nebulosity 3.2.0, no dither

Exposure: 12x480 s

Stacking: Neb 3, bad pixel map, bias included, normalize first, trans+rot align, 1.5 SD stack.

Processing: StarTools 1.3 Crop; Wipe: Color & Brightness; Develop 84.68%; Color:Scientific, 200%; HDRptimize; Contrast; Deconvolute 2.7 pix; Life:Moderate; Track 2.94%; Magic:Shrink 1. CS6 Astronomy Tools increase star color, AstroFrame.

Comments

Revisions

  • IC 443, Jellyfish Nebula, UHC-S, 25 Feb 2014, David Dearden
    Original
  • Final
    IC 443, Jellyfish Nebula, UHC-S, 25 Feb 2014, David Dearden
    B

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IC 443, Jellyfish Nebula, UHC-S, 25 Feb 2014, David Dearden