Image of the day

Captured by
John Greenlee

Before and after

My Account

New to Astromart?

Register an account...

Need Help?

Helix nebula in Ha OIII RGB image

Helix nebula in Ha OIII RGB

Contains: Deep sky object
Acquisition Details
  • Number of frames:
  • FPS:
  • Focal length:
  • CMI/CMII/CMIII:
Description

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 . 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