The Crescent and Soap Bubble Nebula Shining in a Wide Scene from Ha and OIII Emission
Alqueva´s Dark Sky Reserve | By Year: 2023 | Deep Sky Wide Field
The image shows an HaOIII wide field where NGC 6888 also known as the Crescent Nebula, seems to be immersed in. Even looking similar to a supernova remnant, The Crescent is indeed a relatively rare nebula that surrounds WR136 (HD 192163) a Wolf-Rayet dying star in the constellation of Cygnus. The gigantic bubble of gas it was formed by the stellar wind. The central star is releasing massive amounts of gas and UV irradiation, exciting oxygen and hydrogen to emit in the blue and red wavelength illuminating the nebula. The Wolf-Rayet star will probably end up exploding as a supernova within the next 100,000 years. Shinning against the background sculptured by a massive cloud of hydrogen from Cygnus region, is visible another small bubble, known as the the “Soap Bubble” a planetary nebula (PN G75.5+1.7) very faint visible in filtered OIII light. The image was captured from Dark Sky® Alqueva Observatory, Cumeada, in Portugal. This was also the “first light” from my new combo system from Player One Astronomy, the Poseidon-C Pro Camera and the new Anit-Halo PRO Dual-Band (Ha+OIII) 3nm filter and it works incredibly well!
PT: A imagem revela um campo amplo e profundo de HaOIII onde a NGC 6888, também conhecida como Nebulosa Crescente, parece estar imersa. Mesmo parecendo semelhante a uma supernova remanescente, a nebulosa Crescente é de facto uma nebulosa relativamente rara que circunda a WR136 (HD 192163), uma estrela “moribunda” Wolf-Rayet na constelação do Cisne. A gigantesca bolha de gás foi formada pelo vento estelar. A estrela central vai assim libertando grandes quantidades de gás e radiação UV, estimulando a emissão de oxigénio e hidrogénio no comprimento de onda azul e vermelho, que ilumina assim a nebulosa. A estrela Wolf-Rayet provavelmente acabará explodindo como uma supernova nos próximos 100 mil anos. Brilhando contra o fundo esculpido por uma enorme nuvem de hidrogénio da região do Cisne, é visível outra pequena bolha, conhecida como a “Bolha de Sabão”, uma nebulosa planetária (PN G75.5+1.7) muito fraca, visível na luz filtrada OIII (Oxigénio). A imagem foi captada a partir do Observatório Oficial do Dark Sky® Alqueva, na Cumeada, Portugal. Esta foi também a chamada “first light” do meu novo sistema substituto da DSLR, um combo perfeito da Player One Astronomy, a Poseidon-C Pro Camera e novo filtro Anit-Halo PRO Dual-Band (Ha+OIII) 3nm que se revelou verdadeiramente incrível!
Above: Left image: The monochrome version visible in Ha light only. Right image: The monochrome version visible in OIII light only. Below: The final starless image.
PT: Acima: Imagem à esquerda: A versão monocromática visível apenas na luz Ha. Imagem da direita: A versão monocromática visível apenas na luz OIII. Em baixo: A imagem final sem estrelas.
Technical details | Detalhes Técnicos
Taka FSQ-106ED at F3.6 – EM200 auto-guided in N.I.N.A| Poseidon-C Pro Camera from Player One Astronomy | Sub Exp. 5 min with Anit-Halo PRO Dual-Band Filter 2″ (Ha+OIII) 3nm from Player One Astronomy | Total integration of 21h (18,5h in HaOIII + 2,5h in RGB). Processing on PixInsight 1.8.9-2 and Photoshop CC 2023. Cumeada Observatory from Dark Sky® Alqueva Reserve, Reguengos de Monsaraz, Portugal.
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