File:AR 2305 in Hydrogen alpha (16707394420).jpg
Original file (1,255 × 1,113 pixels, file size: 766 KB, MIME type: image/jpeg)
Captions
Summary
[edit]DescriptionAR 2305 in Hydrogen alpha (16707394420).jpg |
This was a first for me. First time I successfully managed a Hydrogen alpha image with a zoom lens (TeleVue PowerMate x 2.5). Previous attempts were usually curtailed by cloud or suffered from a lot of dust motes and an artefact called Newton's Rings. In this case, I had both dust and artefacts but used a flat frame to subtract them from my image which worked very well. I also used Thierry Legault's tip to tap the scope when taking the flat frame as this causes vibration which blurs out any residual half-focused image from the Sun. Celestron 100/100mm scope with 70mm Ha filter. TeleVue PowerMate x 2.5 Skyris 273m CCD camera Ioptron ZEQ25GT mount with Hinode guider. |
Date | |
Source | AR 2305 in Hydrogen alpha |
Author | john.purvis |
Camera location | 55° 02′ 53.87″ N, 6° 55′ 43.18″ W | View this and other nearby images on: OpenStreetMap | 55.048298; -6.928660 |
---|
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 john.purvis at https://flickr.com/photos/16271433@N02/16707394420 (archive). It was reviewed on 25 September 2018 by FlickreviewR 2 and was confirmed to be licensed under the terms of the cc-by-2.0. |
25 September 2018
File history
Click on a date/time to view the file as it appeared at that time.
Date/Time | Thumbnail | Dimensions | User | Comment | |
---|---|---|---|---|---|
current | 08:18, 25 September 2018 | 1,255 × 1,113 (766 KB) | PlanetUser (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.
Width | 1,600 px |
---|---|
Height | 1,200 px |
Bits per component | 16 |
Compression scheme | Uncompressed |
Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Data arrangement | chunky format |
Software used | Adobe Photoshop CC 2014 (Windows) |
File change date and time | 17:35, 22 March 2015 |
Color space | Uncalibrated |
Date and time of digitizing | 17:24, 22 March 2015 |
Date metadata was last modified | 17:35, 22 March 2015 |
Unique ID of original document | xmp.did:61c96e46-b440-3644-bfd0-ffbb9174ee1c |