Glenn Wurden captured this brilliant shot of the Rosette Nebula (Caldwell 49) in Monoceros with his SVX180T. This emission nebula is located approximately 5,200 light-years away from Earth and has a diameter of roughly 130 light-years. It's estimated by scientists to be about 10,000 times the mass of the Sun and is home to around 2,500 young stars, including massive O-type stars HD 46223 and HD 46150. These 2 stars are ultimately responsible for blowing the ionized bubble seen in this nebula. A diffuse X-ray glow is also seen between the stars in the bubble and has been attributed to super-hot plasma with temperatures between 1 and 10 million Kelvin.

According to Glenn: 10-minute subs, at 1260 mm focal length, f/7. Basically, ideal no-Moon conditions from my dome in Los Alamos, New Mexico, using just a UV/IR cut filter on the one-shot cooled color camera.

Other Designations: SH 2-275, CTB 21, Caldwell 49.

Details:

Telescope: SVX180T

Focuser: Moonlite WR35

Flattener: SFFX-2

Camera: One shot color

Accessories: 120mm Guide Camera, OAG

Dome: 12.5" Astrohaven

Mount: Losmandy Titan

Filters: UV/IR Cut

References:

Wikipedia contributors. (2024, September 28). Rosette Nebula. Wikipedia. https://en.wikipedia.org/wiki/Rosette_Nebula