Higher resolution here
This image is a narrowband presentation of hydrogen, sulfur and oxygen emission lines, mapped to red, yellow and blue respectively.
Normally I prefer at least 20 hours of integration on a narrowband, but the clouds have been relentless lately.
Image:
- 14x 600s 6nm H-alpha
- 11x 600s 6nm SII
- 13x 600s 6nm OIII
Total exposure 6 hours 20 minutes.
Hardware:
- Skywatcher Black Diamond ED120
- SkyWatcher EQ8 Pro Mount
- QSI 683-ws Camera @ -15°C
- Astronomik 6nm Ha, 6nm SII, 6nm OIII filters
- Starlight Xpress Lodestar X2 Autoguider
- Innovations Foresight On Axis Guider
- Starlight Instruments Focus Boss II
Location:
- Orange zone in Brisbane, Australia. (Bortle 7)
- Imaged over 2 nights, 50% moon.
Software:
- Planning & camera alignment with Aladin 9
- Captured with AstroArt 6
- Guiding with PHD2 + PHD_Dither
- FocusLock live focusing
- CCDInspector: Image analysis & rejection
- CCDStack 2+: Calibrate, align, stack, deconvolution.
- Photoshop CC: Reduce noise, high pass filter, levels, curves, color map, saturation.