File:NGC6888 - Crescent Nebula (4490458860).jpg

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Description

Subject: NGC6888 - Crescent Nebula

Image FOV: 1.6 degree by 1.066 degrees (96 by 64 minutes)

Image Scale: 4 arc-second/pixel

Date: 2009/05/31

Exposure: 3 x 10m = 30 minutes total exposure, ISO800, f/5.6

Filter: IDAS LP

Camera: Hutech-modified Canon 30D

Lens: Nikon 800mm f/5.6 AIS

Mount: Astro-Physics AP900

Guiding: ST-402 autoguider through SV66 guidescope, Maxim DL autoguiding software with 6-second guide exposures

Processing: Raw conversion and calibration with ImagesPlus (dark and bias frames only, no flat frames); Aligning and combining with Registar. Final processing (levels adjustment, cropping, resizing, JPEG conversdion, etc.) in Photoshop.

Remarks: Temperature = 35F; SQM-L reading: 21.46 (moon had set) -- Imaging cut short after just 30 minutes, due to clouds
Date
Source NGC6888 - Crescent Nebula
Author s58y

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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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@N04/4490458860. 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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Date/TimeThumbnailDimensionsUserComment
current11:30, 19 December 2021Thumbnail for version as of 11:30, 19 December 20211,440 × 960 (543 KB)Siloepic (talk | contribs)Transferred from Flickr via #flickr2commons

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