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Nebulosa do Crescente na constelação do Cisne com a nebulosa planetária PN G75.5+1.7/ Crescent Nebula and planetary PN G75.5+1.7 in Cygnus.
Detalhes/ details:
Telescópio/ telescope: William Optics ZS110 @ f/ 4,7 (w/ Astro-Physics CCDT067)
Câmara/ camera: Atik 314L+, sensor 0..-10 ºC
Filtros/ filters: Astrodon 3 nm, mosaico2X1
Ha 2X (15X 1800")
OIII 2X (15X 1800")
Combinação/ combination: (L)RGB - (20%Ha+80%OIII)(Ha, 50%Ha+50%OIII, OIII)
Exposição total/ total exposure: 30h
Software de aquisição/ Acquisition software: MaximDL, CCD Commander, Robofocus/Focusmax
Processamento/ processing: Pixinsight
Torres Novas, Portugal, agosto- setembro/ august-september 2016