File:M27 -- Dumbbell Nebula (100% crop) (4321017774).jpg
Original file (1,044 × 1,044 pixels, file size: 404 KB, MIME type: image/jpeg)
Captions
Summary
editDescriptionM27 -- Dumbbell Nebula (100% crop) (4321017774).jpg |
Subject: M27 -- Dumbbell Nebula Image FOV = 1 degree square Image Scale = 3.45 arc-second/pixel (100% crop -- no downsizing from 30D image) Date: 2008/08/21 and 2008/08/22 Location: near Halcottsville, NY Exposure: 19 x 5 minutes = 1h35m total exposure, ISO800, f/4.8 Filter: Baader Astronomik UHC (RGB) 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 (dark frames, bias frames, and flat frames); Aligning and combing with Registar; Levels adjustment, cropping/resizing, JPEG conversion with Photoshop CS. No sharpening or noise reduction. Remarks: Aug 21 : temperature at end 55F, SQM-L reading 20.75 at start, 20.08 at end (gibbous moonrise); Aug 22 : temperature at end 55F, SQM-L reading at start, 21.41, 21.45 in middle (moon below horizon), 20.70 at end (gibbous moonrise). |
Date | |
Source | M27 -- Dumbbell Nebula (100% crop) |
Author | s58y |
Licensing
edit- 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@N04/4321017774. 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
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 11:42, 19 December 2021 | 1,044 × 1,044 (404 KB) | Siloepic (talk | contribs) | Transferred from Flickr via #flickr2commons |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
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.
Orientation | Normal |
---|---|
Horizontal resolution | 100 dpi |
Vertical resolution | 100 dpi |
Software used | Adobe Photoshop CS Windows |
File change date and time | 19:33, 31 January 2010 |
Color space | Uncalibrated |
Image width | 1,044 px |
Image height | 1,044 px |
Date and time of digitizing | 14:33, 31 January 2010 |
Date metadata was last modified | 14:33, 31 January 2010 |
IIM version | 2 |