Peter Goodhew
Sh2-188 The Dolphin Nebula #Explored
Selected by BBC The Sky At Night September 2018
www.bbc.co.uk/programmes/p06kg4dh/p06kg0kr
Sharpless 2-188 AKA Simeis 22 or the Dolphin Nebula is an unusual planetary nebula located in the constellation Cassiopeia. The expanding gas from the planetary nebula is colliding with ambient gas in the interstellar medium. The nebula is nearly circular in shape but is much brighter to the southeast (lowerright) because the central star is moving rapidly in that direction. Faint wisps of gas can also be seen in the opposite direction. It's peskily-faint - so faint that I ended up shooting 30-minute subs at bin 4x4.
24 hours in total. RGB 10x300s each.
Ha 21x1200s bin 1x1 plus 10x1800s bin 4x4
OIII 12x1200s bin 1x1, plus 3x1800s bin 4x4
APM TMB 152 F8 LZOS, 10 Micron GM2000HPS, QSI6120ws8
Sh2-188 The Dolphin Nebula #Explored
Selected by BBC The Sky At Night September 2018
www.bbc.co.uk/programmes/p06kg4dh/p06kg0kr
Sharpless 2-188 AKA Simeis 22 or the Dolphin Nebula is an unusual planetary nebula located in the constellation Cassiopeia. The expanding gas from the planetary nebula is colliding with ambient gas in the interstellar medium. The nebula is nearly circular in shape but is much brighter to the southeast (lowerright) because the central star is moving rapidly in that direction. Faint wisps of gas can also be seen in the opposite direction. It's peskily-faint - so faint that I ended up shooting 30-minute subs at bin 4x4.
24 hours in total. RGB 10x300s each.
Ha 21x1200s bin 1x1 plus 10x1800s bin 4x4
OIII 12x1200s bin 1x1, plus 3x1800s bin 4x4
APM TMB 152 F8 LZOS, 10 Micron GM2000HPS, QSI6120ws8