Helix_final

Helix-Nebel (NGC 7293), "Eye of God", Narrowband (hAlpha, OIII, SII), IR and RGB. Very long exposure time. 36 h hAlpha, 20 h OIII, 12 h SII, 16 h IR and 32 h RGB. Instruments: RASA 11"/F2.2 and Hyperstar 14"/F1.9. ATIK 490 color cooled (-15 °C) and ASI ZWO 1600 mono cooled (-25°C). Tenerife, 1180 m a.s.l. During October and November 2017

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