Trois_Merlettes
Inside the Heart nebula IC1805
This emission nebula which shines weakly in Cassiopeia symbolizes the magic of the Heavens specially if you image it with narrow band filters. I laboured for 4 nights on this with problems of passing clouds and a still unsolved problem of a sudden loss of autoguiding. The OIII and SII lights are weak and required very long exposure even with an F/D=2 system!
C11-HD telescope equipped in hyperstar with a SXVR-H18 camera. Total exposure 7h30'. Hubble palette: Ha (17 subs of 600s) set to luminance and Green; SII (5 subs of 1200s) set to red and OIII (9 subs of 1200s) set to blue. Urban site but no Moon.
Inside the Heart nebula IC1805
This emission nebula which shines weakly in Cassiopeia symbolizes the magic of the Heavens specially if you image it with narrow band filters. I laboured for 4 nights on this with problems of passing clouds and a still unsolved problem of a sudden loss of autoguiding. The OIII and SII lights are weak and required very long exposure even with an F/D=2 system!
C11-HD telescope equipped in hyperstar with a SXVR-H18 camera. Total exposure 7h30'. Hubble palette: Ha (17 subs of 600s) set to luminance and Green; SII (5 subs of 1200s) set to red and OIII (9 subs of 1200s) set to blue. Urban site but no Moon.