File:M4 and Sh2-1 -- H-alpha (8449826190).jpg
![File:M4 and Sh2-1 -- H-alpha (8449826190).jpg](https://upload.wikimedia.org/wikipedia/commons/thumb/3/37/M4_and_Sh2-1_--_H-alpha_%288449826190%29.jpg/800px-M4_and_Sh2-1_--_H-alpha_%288449826190%29.jpg?20211219113459)
Original file (2,376 × 1,584 pixels, file size: 1.02 MB, MIME type: image/jpeg)
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Summary
[edit]DescriptionM4 and Sh2-1 -- H-alpha (8449826190).jpg |
Subject: M4, M80, Sh2-1, etc., with H-alpha filter Image Size: 2376 x 1584 Image FOV: 12.3 degrees by 8.2 degrees (full frame) Image Scale: 18.6 arc-second/pixel (reduced to 50%) Date: 2011/06/02 (Processing backlog of old images) Exposure: 6 x 10m = 60 minutes total exposure, ISO1600, f/2.5 Filter: Astrodon 5nm H-alpha Camera: Hutech-modified Canon T1i/500D Lens: Nikon 105mm f/2.5 AI-S Mount: Astro-Physics AP900 Guiding: ST-402 autoguider through TV-102iis guidescope, Maxim DL autoguiding software with 6-second guide exposures
Remarks: Temperature start/end = 50F/49F; Humidity start/end 49%/53%; SQM-L reading start/end = 21.47/21.43 (zenith); Light pollution dome covers target area. Nothing special here -- just waiting for the main target (M16/M17) to rise. |
Date | |
Source | M4 and Sh2-1 -- H-alpha |
Author | s58y |
Licensing
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This image was originally posted to Flickr by s58y at https://flickr.com/photos/45032885@N04/8449826190. 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/Time | Thumbnail | Dimensions | User | Comment | |
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current | 11:34, 19 December 2021 | ![]() | 2,376 × 1,584 (1.02 MB) | Siloepic (talk | contribs) | Transferred from Flickr via #flickr2commons |
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Metadata
This file contains additional information such as Exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. If the file has been modified from its original state, some details such as the timestamp may not fully reflect those of the original file. The timestamp is only as accurate as the clock in the camera, and it may be completely wrong.
Width | 4,752 px |
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Height | 3,168 px |
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Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 300 dpi |
Vertical resolution | 300 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CS5.1 Windows |
File change date and time | 22:41, 3 February 2013 |
Color space | Uncalibrated |
Date and time of digitizing | 17:21, 30 December 2012 |
Date metadata was last modified | 17:41, 3 February 2013 |
Unique ID of original document | xmp.did:CFF94DBEF952E2119F09C6D9A3649479 |