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David Callejas

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January 20, 2019

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Patrick Prokop
Savannah, GA, USA

10/23/2021
11:00 pm

Photographer's Website

Equipment Details:

Telescope: Orion EON 130mm Triplet Refractor
Field reducer: Orion 0.8x for the EON 130
Focal ratio: f/5.6
Camera: ZWO ASI 1600mm Pro (monochrome)
Subframes: 5 minutes each except Green (3mn)
Filters:
- Hydrogen Alpha (7nm) ... 2hr 35min
- Oxygen 3 (7nm) ...1hr 40min
- Sulfur 2 (7nm) ... 1hr 05min
- Green (broadband) 1h 30mn
Total integration time: 6hr 50mn
Camera Gain ... sensor temp: 139 ... -10°C
Mount: SkyWatcher EQ6-R Pro
Capture Software: N.I.N.A. Version 11.1 nightly build

Post-processing Details:

Stacking: Deep SkyStacker
Post-processing: PixInsight and Photoshop CC

Image Details:

With Halloween coming up, I thought the Ghost of Cassiopeia is appropriate to view, particularly with the pumpkin orange hue to the nebulosity.

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January 20, 2019

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David Callejas

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About the Author:

David Callejas, Marketing Director, helps bring EarthSky's content to the world via online ads and other products. He creates strategies that help people around the world find us and appreciate the work we do. He helps manage the EarthSky Store and bring to you the new products that you love. He's the chief liaison between EarthSky.org and the world of commerce. All that, plus he helps post content and populate our pages on Facebook, Google+ and Twitter. Go David!