Large Solar Prominence Surrounding the Sun’s Disc

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Captured on Februray 24, 2021, from Dark Sky® Alqueva region, Portugal, with a Solar Ha telescope – at the wavelength of Hydrogen-Alpha, the high-resolution image features a gigantic solar prominence visible around the sun´s limb at UT 14h02 (Universal Time). Due to hard conditions by that time like winds, clouds and a very unstable seeing (atmospheric stability), I couldn´t get so small scale details as I wish, although, the large scale prominence was so incredible that I had to capture it in a few videos shots, although, not enough for a time lapse which needs a long period of time with nice amtospheric conditions. 

PT: Captada a 24 de Fevereiro de 2021, a partir da região do Dark Sky® Alqueva, Portugal, com um telescópio Solar Ha – no comprimento de onda do Hidrogénio Alfa, a imagem de alta resolução apresenta uma gigantesca promeminência solar visível às 14h02 UT (Tempo Universal) ao redor do limbo solar. Devido às condições difíceis desse dia, com vento, nuvens passageiras e uma atmosfera muito instável (seeing), não consegui obter detalhes numa escala tão fina como gostaria. No entanto, a proeminência que apresenta detalhes numa escala média era tão incrível que tive de registá-la em alguns vídeos, embora não tenham sido suficientes para criar um time-lapse, que precisa assim de um longo período de tempo com boas condições amtosféricas.


Above – from left to right – is possible to appreciate the color portrait of a shot taken between UT 14h02 (prominence) and 14h13 (surface), and the BW version.

PT: Acima – da esquerda para a direita – é possível apreciar o retrato a cores de uma foto tirada entre as 14h02 UT (proeminências) e as 14h13 UT (superfície), e a respectiva versão a preto e branco. 

Technical details | Detalhes Técnicos

LUNT LS100T Ha | AZ-HEQ5GT | ASI174MC | ZWO AD | Powermate 4x | Stack of 250 frames for the single image, captured in medium seeing conditions from Dark Sky® Alqueva territory, Portugal.


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