# Sh2-216 c lsho 1218m+812m+903m 2933m 49h

- By: Ram samudrala
- Date: 2021-04-03
- Classification: Photograph
- Museum: [Wikimedia Commons](https://commons.wikimedia.org/wiki/File:Sh2-216_c_lsho_1218m%2B812m%2B903m_2933m_49h.jpg)
- Rights: [CC BY 4.0](https://creativecommons.org/licenses/by/4.0)
- Picture: https://upload.wikimedia.org/wikipedia/commons/thumb/e/ec/Sh2-216_c_lsho_1218m%2B812m%2B903m_2933m_49h.jpg/1920px-Sh2-216_c_lsho_1218m%2B812m%2B903m_2933m_49h.jpg
- Who can see it: Kids profiles and older (museums give no ratings; placed by Invisible Network from the museum's own words)

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).

Camera: QHY163M (16mp mono) CMOS cooled to -15 degrees C. Telescope: Stellarvue SV70T triplet apochromat refractor @ f/4.8. Reducer: SFFR70-APO (0.8x). Mount: Paramount MyT. Filters: 1.25" Astrodon 5nm Ha, 3nm O3, 3nm S2. Software: TheSkyX Pro, SharpCap, PixInsight, Topaz Studio 2.

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…