Massive Clouds of Hydrogen Gas Glowing in Cepheus Revealed in a Deep Wide Scene
Alqueva´s Dark Sky Reserve | By Year: 2024 | Deep Sky Wide Field
The deep wide field scene shows in Ha and OIII emission, the large complexity of bright and dark nebulosity located in Cepheus constellation. The view is amazing revealing a tremendous amount of hydrogen gas in a large field of view, comprising dozens of well know nebulae such as the large bright cloud where is located the Elephant’s Trunk Nebula IC1396, up to the opposite edge where is visible Lobster Claw Nebula SH2-157. It’s also Incredible to compare the differences in angular size between some of these objects that we are used to see in close-up images, such as the bright shell of Flying Bat with the embedded blueish Squid Nebula or the the Lion Nebula Sh2-132 Immersed in a glowing field of ionised hydrogen and oxygen gas (Ha and OIII emission). At the end is available the annotated detailed version containing the main objects visible in the image. Captured from Dark Sky® Alqueva Observatory, Cumeada, in Portugal.
PT: Este campo amplo e profundo mostras nas emissões do comprimento de onda Ha (hidrogénio) e OIII (oxigénio), a grande complexidade de nebulosidade brilhante e escura localizada na cosntelação do Cefeu. A visão é incrível, revelando uma tremenda quantidade de gás hidrogénio-alfa num grande campo de visão que compreende dezenas de nebulosas bem conhecidas, como a grande nuvem brilhante onde se encontra a Nebulosa da Tromba do Elefante até ao extremo oposto da imagem onde é possível ver a Nebulosa Garra de Lagosta SH2-157. Também é igualmente interessante comparar as diferenças de tamanho angular entre alguns destes objetos que estamos habituados a ver em imagens close-up, como a concha brilhante do Morcego Voador com a sua Nebulosa da Lula azulada embutida ou a Nebulosa do Leão Sh2-132 imersa no brilho do gás hidrogénio e oxigénio ionizado (emissão de Ha e OIII). No final da página encontra-se uma versão com a anotação detalhada dos principais objectos visíveis na imagem. Captada a partir do Observatório Oficial do Dark Sky® Alqueva, na Cumeada, Portugal.
Below: The annotated version produced with PixInsight script, based in several known catalogues to identify the main objects in the image.
PT: Em baixo: A versão legendada com anotação produzida pelo script do PixInsight baseado em vários catálogos reconhecidos, identificando assim os principais objectos visíveis na imagem.
Technical details | Detalhes Técnicos
Canon Lens 70-200mm f/2.8 set to 70mm + 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 of 21h (18h in HaOII + 3h25 min in RGB). Mount EQ6 Pro – N.I.N.A. Processing on PixInsight 1.8.9-3, photoshop CC 2024. Cumeada Observatory from Dark Sky® Alqueva Reserve, Reguengos de Monsaraz.
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