Rosette Nebula | NGC 2237 | C 49 | Simone Curzi

Astropod, Nebulae

Astropod | May 9th 2023


The Rosette Nebula, also known as NGC 2237 and Caldwell 49, is a large, circular emission nebula located in the constellation Monoceros. It is approximately 5,200 light-years away from Earth and has a diameter of about 130 light-years. The nebula’s name is derived from its rose-like shape, formed by massive clouds of interstellar gas and dust. The heart of the Rosette Nebula contains a cluster of hot, young stars, which energize the surrounding gas and cause it to emit a stunning array of colors.

Rosette Nebula | Credit: Simone Curzi
Rosette Nebula | Credit: Simone Curzi

Simone Curzi’s captivating image of the Rosette Nebula offers a unique narrowband interpretation, highlighting the intricate Sulfur-II (SII) filaments in the central region of the cosmic rose. By carefully balancing the colors of the narrowband image, Simone has managed to create a natural-looking representation of this celestial masterpiece.

The Rosette Nebula is a popular target for astrophotographers due to its distinct shape, size, and the variety of colors it displays. Simone’s dedication to capturing the intricate details of the nebula has resulted in an image that showcases the beauty and complexity of this galactic rose.

Gear and equipment used

  • Imaging Telescope: Sharpstar 94EDPH
  • Imaging Camera: ZWO ASI2600MM Pro
  • Mount: iOptron CEM25P
  • Filters: Optolong Blue 36 mm, Optolong Green 36 mm, Optolong H-Alpha 7nm 36 mm, Optolong OIII 6.5nm 36 mm, Optolong Red 36 mm, Optolong SII 6.5nm 36 mm
  • Software: Pleiades Astrophoto PixInsight

Image acquisition details

  • Dates: 5 Feb 2023, 6 Feb 2023, 7 Feb 2023, 13 Feb 2023
  • Frames:
    • Optolong Blue 36 mm: 10×300″ (50′) (gain: 0.00) f/4.4 -5°C bin 1×1
    • Optolong Green 36 mm: 10×300″ (50′) (gain: 0.00) f/4.4 -5°C
    • Optolong H-Alpha 7nm 36 mm: 60×300″ (5h) (gain: 100.00) f/4.4 -5°C bin 1×1
    • Optolong OIII 6.5nm 36 mm: 60×600″ (10h) (gain: 100.00) f/4.4 -10°C bin 1×1
    • Optolong Red 36 mm: 10×300″ (50′) (gain: 0.00) f/4.4 -5°C bin 1×1
    • Optolong SII 6.5nm 36 mm: 60×600″ (10h) (gain: 100.00) f/4.4 -10°C bin 1×1
  • Integration: 27h 30′
  • Darks: 7
  • Flats: 15
  • Flat darks: 15

Image processing techniques

Simone Curzi used Pleiades Astrophoto PixInsight for processing the image. The goal was to bring out the SII filaments in the center of the Rosette Nebula while maintaining a natural-looking color palette for the narrowband image. By carefully adjusting the color balance and enhancing the contrast, Simone was able to create a visually striking and detailed representation of the Rosette Nebula.

Significance of the image

The Rosette Nebula is a well-known object among astronomers and astrophotographers due to its unique shape and vibrant colors. By capturing the intricate details of the nebula and highlighting the SII filaments in the center, Simone’s image adds to our appreciation of this celestial wonder. The image not only showcases the beauty of the Rosette Nebula but also demonstrates the potential of narrowband astrophotography to reveal hidden details in deep-sky objects.

Photographer credits

Simone Curzi is the talented astrophotographer behind this stunning image of the Rosette Nebula. To see more of Simone’s work and follow his astrophotography journey, visit his website here and follow them on Instagram.

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