Sh 2-308 The Dolphin Head Nebula

Imaged in HOO. (Hydrogen Oxygen Oxygen)

 

total integration- 680 minutes or just over 11 and a half hours

OIII- 470 minutes

Ha -210 minutes

 

Equipment

 

EQ6 pro -Rowan belt modded

Sharpstar Z4 (100mm f 5.5)

ZWO ASI 533 MM

ASIAIR

Antlia 3 nm H alpha filter

Optolong 3 nm OIII filter

 

imaged over several sessions in December 2022- moon ranged from waxing gibbous through to first quarter

 

Software

ASIAIR

AstroPixel Processor (APP)

Phostoshop CS6( with NoiseXterminator plug in)

Starnet ++ v2

 

Processing note

1.stacked Ha and OIII data in AAP separately

2. stretched in APP- most aggressive stretch applied to Ha data, less agressive to OIII

3. Noise reduced using NoiseXterminator

4. HOO image created in APP using HOO1 algorithm

5. curves and levels in Photoshop

 

Needs more data! ideally from a dark site but from Bortle 6, maybe double - say another 10 hours

Done