The Rosette Nebula
The Rosette Nebula (C 49) is a Hii region located in the constellation Monoceros. It is about 5000 light-years from Earth. Open cluster NGC 2244 is at the centre of the nebula. The stars have formed by consuming the surrounding dust and gases.
Gear USed
I have imaged the Rosette nebula using a 750mm reflector telescope on a german equatorial tracking mount with a cooled astrophotography camera. I have used a smaller scope with a secondary camera for guiding.
- Telescope - Skywatcher 150 Black Diamond F5 750mm
- Mount - Saxon NEQ6 Pro
- Camera - ZWO ASI533 MC Pro
- Filter - Optolong L-Enhance
- Guiding - QHY mini scope and camera kit.
image specifications
To image the Rosette Nebula, I have used multiple 300-second exposures. Each exposure has been combined into one image using Deepsky Stacker software. Because of the field of view (FOV) provided by my camera sensor and scopes focal length, this is a mosaic of 5 different images. Each mosaic panel has different combined exposure times, from 25 minutes to two hours. I have set the gain to 100, which is unity gain for my camera. My camera was cooled to -5 degrees to help combat noise.
To achieve the faux HOO palette, I have extracted the colour channels and recombined them in Pixinsight, my choice of image editing software. Learn more about the Rosette Nebula