Comet C/2025 A6 Lemmon Featuring a Beautiful Long Tail On 1st October 2025
Alqueva´s Dark Sky Reserve | By Year: 2025 | Comets in the Sky | Deep Sky Wide Field
The image shows Comet c/2025 A6 Lemmon on 01st October 2025. Besides the wonderful greenish coma from glowing carbon gas the image reveals a very long tail immersed in a colorful starfield. The comet features a bluish ion tail and a shorter white dust tail on the image. The comet was photographed two hours before morning Twilight from Dark Sky® Alqueva Observatory in Portugal. This long distance traveller has been so active, that in a few minutes the structure changes in the comet’s tail, being most likely the result of being buffeted by the solar wind as well as the dynamic jets inside its own core. Lemmon is also moving fast against the background starry sky, and that night it was located between Lynx constellation and Ursa Major, at a distane of 1 AU (155.5 million kms)..
PT: A imagem mostra o Cometa c/2025 A6 Lemmon no dia 1 de outubro de 2025. Para além da maravilhosa cabeleira esverdeada de dióxido de carbono brilhante, a imagem revela uma cauda muito longa imersa num campo estelar colorido. O cometa apresenta uma cauda de iões azulada e uma cauda de poeira branca, mais curta, visível na imagem. O cometa foi fotografado duas horas antes do crepúsculo matinal a partir do Observatório Dark Sky® Alqueva, em Portugal. Este viajante de longa distância tem estado tão activo, que, em poucos minutos, a estrutura da sua cauda pode mudar significativamente, provavelmente como resultado de ser atingido pelo vento solar, bem como pelos jactos dinâmicos que ocorrem no seu próprio núcleo. O Lemmon também se está a mover rapidamente contra o céu estrelado de fundo e nessa noite, estava localizado entre a constelação de Lince e a Ursa Maior, a uma distância de 1 UA (155,5 milhões de km).
Technical details | Detalhes Técnicos
Taka FSQ-106ED at F5 – EM200 auto-guided in N.I.N.A| Camera ZEUS 455C Pro from Player One Astronomy | Sub Exp. 2 min | Total integration of 2h in RGB. Processing on PixInsight 1.8.9-2 and Photoshop CC 2025. Cumeada Observatory from Dark Sky® Alqueva Reserve, Reguengos de Monsaraz, Portugal.
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