Here is my latest image of the Helix nebula, also known as NGC 7293. There are lots of details about this nebula in Google so will focus on how I made this image without processing details yet
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This is a result of two nights imaging sessions.
First session took place in the Negev desert Israel on Fri Aug 30, 2019, in this session I imaged with NB filters Ha & OIII, moonless night.
Ha- 10x1200sec @ -10deg c` on sensor, bin 1x1.
OIII- 9x1200sec @ -10deg c` on sensor, bin 1x1.
In SGP I selected rotate through event and dither every two images.
Second session took place on the same location on Fri Sep 7, 2019, in this session I imaged with RGB filters, had half-moon on the sky but it didn`t interfere much.
R- 11x600sec @ -10deg c` on sensor, bin 2x2.
G- 11x600sec @ -10deg c` on sensor, bin 2x2.
B- 11x600sec @ -10deg c` on sensor, bin 2x2.
In SGP I selected rotate through event and dither every three images.
Total integration time: 11:50h
Calibration- Bias- bin 1x1 & 2x2- 200 each @ -10deg c`
Flat- bin 1x1 for Ha & OIII- 30 each @ -10deg c`
Flat- bin 2x2 for RGB- 30 each @ -10deg c`
Dark- bin 1x1 for Ha & OIII- 10 each, 1200sec @
-10deg c`
Dark- bin 2x2 for RGB- 20 each, 600sec @
-10deg c`
Equipment details:
Mount- Losmandy G11 G2 modified
Scope- William Optics 152mm f/8 LZOS OK-4 optics, TMB design.
Camera- Starlight Xpress Trius SX694 mono & SX Filter Wheel & Astrodon 36mm unmounted E series Gen2 LRGB,Ha,OIII
Guider- SX Lodestar x2 & SX OAG
Flattener- TSFlat2.5, 2.5".
Software:
Camera & mount control- SGP via Ascom
Guiding- PHD2
Sky chart- Stellarium
Mount main control- Gemini.net via Ascom
Registration, Calibration & stacking images- Maxim DL5
Processing- PS CS6