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File:M13, NGC6207, IC4617 (4490415776).jpg

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Description

Subject: M13, NGC6207, IC4617, etc.

Image FOV: 1.166 degrees by 1 degree (70 by 60 minutes)

Image Scale: 4 arc-second/pixel

Date: 2009/05/31

Exposure: 12 x 5m = 1 hour 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 = 36F/35F start/end; SQM-L reading = 21.44/21.45 start/end (Moon had set)

NGC6207 is the faint galaxy in the lower left, and IC4617 is the fainter galaxy halfway up towards M13. There are many even fainter galaxies in the field.
Date
Source M13, NGC6207, IC4617
Author s58y

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This file is licensed under the Creative Commons Attribution 2.0 Generic license.
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This image was originally posted to Flickr by s58y at https://flickr.com/photos/45032885@N04/4490415776. 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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current11:30, 19 December 2021Thumbnail for version as of 11:30, 19 December 20211,050 × 900 (265 KB)Siloepic (talk | contribs)Transferred from Flickr via #flickr2commons

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