File:154-panel Widefield Milky Way Panorama.jpg

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Original file ‎(11,096 × 2,979 pixels, file size: 8.54 MB, MIME type: image/jpeg)

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Description

Subject: Milky Way Widefield

Image Size: 11096 x 2979 -- reduced to 12.5% original size

Image FOV: 220 degrees by 30 degrees (approx) Image Scale: 90 arc-second/pixel (approx)

Date: 2012/06/15 to 2012/11/18 -- 13 imaging sessions

Exposure: 154 panels, each 5 x 5min or 6 x 5 min (25min or 30 min each) Total exposure = 77 hours 50 minutes, ISO1600, f/2.8 Filter: Astronomik CLS Camera: Hutech-modified Canon T1i/500D Lens: Contax/Yashica 85mm f/2.8 Mount: Astro-Physics AP900

Guiding: ST-402 autoguider through TV-102iis guidescope, Maxim DL autoguiding software


Processing: Raw conversion and calibration for each panel with ImagesPlus; Aligning and combining with Registar. Preliminary processing of each panel with photoshop-- levels adjustment to make each panel about the same brightness, cropping to 4752x3168 to remove ragged edges from alignment, and 50% reduction to 2376 x 1584. 154 panels combined into a mosaic using AutoPano Pro 2 (Mercator projection, SmartBlend), with 50% reduced output (22192x5957). Final processing with Photoshop -- more levels adjustment, etc., another 50% reduction to 11096 x 2929, conversion to 8-bit mode and JPEG. Total reduction is to 1/8 original size, so 64 original pixels make one pixel in the final image.

Remarks:

2012/06/15 -- Temp start/end 58F/53F, Relative Humidity start/end 73%/85%, SQM-L start/end 21.45/21.34 (moonrise)

2012/06/23 -- Temp start/end 58F/53F, Relative Humidity start/end 75%/78%, SQM-L start/end 21.46/21.13 (dawn)

2012/07/24 -- Temp start/---- 62F/----, Relative Humidity start/---- 50%/----, SQM-L start/---- 21.13 (moonset)

2012/08/16 -- Temp start/end 63F/56F, Relative Humidity start/end 67%/87%, SQM-L start/end 21.47/21.28

2012/08/18 -- Temp start/end 54F46/F, Relative Humidity start/end 83%/95%, SQM-L start/end 21.39/21.39

2012/08/21 -- Temp start/end 55F/51F, Relative Humidity start/end 87%/96%, SQM-L start/end 21.40/21.40

2012/09/12 -- Temp start/end 58F/49F, Relative Humidity start/end 71%/95%, SQM-L start/end 21.35/21.34

2012/09/13 -- Temp start/end 61F/53F, Relative Humidity start/end 58%/95%, SQM-L start/end 21.34/21.36

2012/09/15 -- Temp start/end 53F/46F, Relative Humidity start/end 71%/95%, SQM-L start/end 21.02??/21.18

2012/09/19 -- Temp start/end 46F/37F, Relative Humidity start/end 71%/96%, SQM-L start/end 21.37/21.39

2012/10/12 -- Temp start/end 32F/22F, Relative Humidity start/end 58%/85%, SQM-L start/end 21.02??/21.02??

2012/11/08 -- Temp start/end 27F/24F, Relative Humidity start/end 71%/65%, SQM-L start/end 21.21/20.94 (moonrise)

2012/11/17 -- Temp start/end 31F/27F, Relative Humidity start/end 71%81/%, SQM-L start/end 21.27/21.44
Date
Source 154-panel Widefield Milky Way Panorama
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://www.flickr.com/photos/45032885@N04/8575412635. It was reviewed on 8 June 2013 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-2.0.

8 June 2013

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Date/TimeThumbnailDimensionsUserComment
current18:26, 8 June 2013Thumbnail for version as of 18:26, 8 June 201311,096 × 2,979 (8.54 MB)Jacopo Werther (talk | contribs){{Information |Description=Subject: Milky Way Widefield Image Size: 11096 x 2979 -- reduced to 12.5% original size Image FOV: 220 degrees by 30 degrees (approx) Image Scale: 90 arc-second/pixel (approx) Date: 2012/06/15 to 2012/11/18 -- 13 imagi...

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