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On this page I collect my observations of the planetary nebula Sh2-274 (Medusa Nebula; Abell 21) in constellation Gemini.
The planetary nebula Sh2-274 (Medusa Nebula; Abell 21) in constellation Gemini is extended and therefore faint (low surface brightness). The nebula owes its proper name to the snake-like gas filaments, which are reminiscent of Medusa's hair. It was cataloged by the astronomer Stewart Sharpless in his catalog of nebulae published in 1959.
Sh2-274 (Medusa Nebula)
Size: 12' (Wikipedia)
Distance: 1,500 light years (Wikipedia)
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The planetary nebula Sh2-274 (Medusa Nebula; Abell 21) in constellation Gemini (Image Courtesy of SkySafari Astronomy, www.simulationcurriculum.com)
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Sh2-274, Feb 23, 2025 - 1350 (642 frames = 1:47 h), section, Dual Band Filter |
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Sh2-274, Feb 23, 2025 - 1350 (642 frames = 1:47 h), photo top left processed (PSE) |
Sh2-274, Feb 23, 2025 - 1350 (642 frames = 1:47 h), photo top left processed (PSE) and denoised (DN) |
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Sh2-274, Feb 23, 2025 - 1350 (642 frames = 1:47 h), photo top left alternatively processed (PSE) |
Sh2-274, Feb 23, 2025 - 1350 (642 frames = 1:47 h), photo top left alternatively processed (PSE) and denoised (DN) |
