NGC 2835 Spiral Galaxy
21-Apr-2017
NGC2835 is a small, faint spiral galaxy in the Hydra constellation. It was probably too small and faint to attempt from the suburbs of Brisbane, but I persisted through the very few clear nights I could get over the last 6 weeks.
Image:
- 49x 600s Lum bin1x1 + 20 flat + 50x dark + 120x bias
- 9x 600s Red bin1x1 + 20 flat + 50x dark + 120x bias
- 9x 600s Green bin1x1 + 20 flat + 50x dark + 120x bias
- 9x 600s Blue bin1x1 + 20 flat + 50x dark + 120x bias
Total exposure 12 hours 40 minutes.
Hardware:
- Celestron EdgeHD 1100
- Celestron EdgeHD 0.7x focal reducer
- SkyWatcher EQ8 Pro Mount
- QSI 683-ws Camera @ -15°C
- Astronomik typ 2c RGB filters
- Starlight Xpress Lodestar X2 Autoguider
- Innovations Foresight On Axis Guider
- Starlight Instruments Focus Boss II
- Starlight Xpress Adaptive Optics
Location:
- Orange zone in Brisbane, Australia. (Bortle 7)
- Imaged 8 nights over 6 weeks due to long periods of heavy cloud cover
Software:
- Planning & camera alignment with Aladin 9
- Captured with AstroArt 6
- Guiding with PHD2 + PHD_Dither
- Live focusing with FocusLock
- CCDInspector: Image analysis & rejection
- CCDStack 2+: Calibrate, align, stack, gradient removal, deconvolution, combine RGB.
- Photoshop CC: Reduce noise, curves, high pass filter, combine L+RGB, color balance, saturation.