File:Sh2-216 c lsho 1218m+812m+903m 2933m 49h.jpg
Original file (4,644 × 3,506 pixels, file size: 12.43 MB, MIME type: image/jpeg)
 | This is a file from the Wikimedia Commons. Information from its description page there is shown below. Commons is a freely licensed media file repository. You can help. |
Summary
| Description |
English: Planetary nebula Sh2-216/LBN744/PNG158.5+00.7/PK158+00.1 (c-lsho)
Sh2-216 total integration: ~49 hours/2933 minutes (174 x 420s or 20.3h for Ha + 129 x 420s or 15h for O3 + 116 x 420s or 13.5h for S2).
http://ram.org/ramblings/cosmos/ Sh2-216 is one of the closest planetary nebulae to us, with a distance of 420 light years. It is also one of the largest in terms of appearance from us because of its closeness, taking up most of the frame of my SV70T scope (reduced), with actual estimated dimensions ranging from 9-30 light years. The nebula is estimated to be 600,000 years old, formed out of the remnants of a white dwarf. Sh2-216 is a very faint object but I managed to get a decent amount of data to ensure that the filaments and background is sufficiently highlighted. The nebula is rich in O3 and S2 signal which mapped to blue and red appear as a diffuse multicoloured background overlaid by a green and yellow Ha streaks. The combination ended up looking like a surreal/psychedelic rainbow coloured candy. In most of my narrowband images, I tend to do a SCNR to make the image bicolour or at least reduce the green since that is mapped to the Ha data which can be overwhelming. In this case, I just left things as is after the SHO mapping to RGB so you can see all the colours of the rainbow here. The image based on using the Ha data for the luminance turned out the best in my view; the SHO image alone (without any luminance) also looked decent but the blues didn't stand out as much, so I went with the former. The final image processed using TopazStudio 2 tends to stand out a bit more than the one done using PixInsight alone. It's not just the saturation boost but a lot of things the software does under the hood that tweak it so slightly and move the image from being a fair representation of the data (which is found in the PixInsight image and is pretty decent by itself in my opinion) to something even more artistic. |
| Date | |
| Source | Own work |
| Author | Ram samudrala |
| Camera location |  | View this and other nearby images on: OpenStreetMap |  |
|---|
Assessment
|
|
This image was selected as picture of the day on Vietnamese Wikipedia for 30 July 2023.
|
Licensing
- 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 file was uploaded as part of Wiki Science Competition 2021. |
|
This image has been assessed using the Quality image guidelines and is considered a Quality image.
|
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 10:53, 25 November 2021 | | 4,644 × 3,506 (12.43 MB) | Ram samudrala | Uploaded own work with UploadWizard |
File usage
The following 3 pages use this file:
Global file usage
The following other wikis use this file:
- Usage on de.wikipedia.org
- Usage on fr.wikipedia.org
- Usage on it.wikipedia.org
- Usage on ja.wikipedia.org
- Usage on vi.wikipedia.org
- Usage on www.wikidata.org
