File:IC1396 -- RGB + H alpha (4144731849).jpg

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IC1396 -- Elephant Trunk Nebula Subject: IC1396 -- Elephant Trunk nebula

Image FOV = 3.25 degrees by 2 degrees 35 minutes (195 by 155 minutes)

Image Scale = 10 arc-second/pixel

Date: 2008/10/04 (Ha) 2008/10/23 (RGB)

Location: near Halcottsville, NY

Exposure: RGB -- 9 x 10 minutes; Ha -- 18 x 10 minutes = 4h30m total exposure, ISO800, f/4.8

Filter: RGB -- IDSA LPS filter; Ha -- Baader 7nm H-alpha filter

Camera: Hutech-modified Canon 30D

Telescope: SV80S 80mm f/6 + TV TRF-2008 0.8X reducer/flattener = 384mm FL, f/4.8

Mount: Astro-Physics AP900

Guiding: ST-402 autoguider and SV66 guidescope. MaximDL autoguiding software using 6-second guide exposures


Processing: Raw conversion and calibration with ImagesPlus; Aligning and combing with Registar; Levels, curves, cropping/resizing, Gray conversion JPEG conversion with Photoshop CS. No sharpening or noise reduction. Combined red channel = Max(dimmed RGB red, H-alpha red channel) Combined green channel = Max(dimmed RGB green channel, 0.20 * H-alpha red channel) Combined blue channel = Max(dimmed RGB blue channel, 0.33 * H-alpha red channel).

Remarks: RGB -- Temperature at start/end: 30F/24F, SQM-L reading at start/end = 21.27/21.30; H-alpha -- Temperature at start/end: 28F/29F, SQM-L reading at start/end = 21.26/21.29
Date
Source IC1396 -- RGB + H_alpha
Author s58y

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
You are free:
  • to share – to copy, distribute and transmit the work
  • to remix – to adapt the work
Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
This image was originally posted to Flickr by s58y at https://flickr.com/photos/45032885@N04/4144731849. It was reviewed on 19 December 2021 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0.

19 December 2021

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current11:38, 19 December 2021Thumbnail for version as of 11:38, 19 December 20211,170 × 930 (286 KB)Siloepic (talk | contribs)Transferred from Flickr via #flickr2commons

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