Above: another rendition - 17 April 2025
Image awarded APOD BRASIL - Image of the Day - 10th Dec. 2024
The Rosette Nebula (also known as Caldwell 49) is a large spherical H II region (circular in appearance) located near one end of a giant molecular cloud in the Monoceros region of the Milky Way Galaxy. The open cluster NGC 2244 (Caldwell 50) is closely associated with the nebulosity, the stars of the cluster having been formed from the nebula's matter.
The cluster and nebula lie at a distance of some 5,000 light-years from Earth and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.
A survey of the nebula with the Chandra X-ray Observatory has revealed the presence of numerous new-born stars inside optical Rosette Nebula and studded within a dense molecular cloud. Altogether, approximately 2500 young stars lie in this star-forming complex, including the massive O-type stars HD 46223 and HD 46150, which are primarily responsible for blowing the ionized bubble. Most of the ongoing star-formation activity is occurring in the dense molecular cloud to the south east of the bubble.
Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600MM
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera: QHY 5 II
Focal Extender / Reducer: 0.73X
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters: Astrodon Ha (3nm), OIII (3nm) and SII (3nm)
Accessories: Robofocus Focuser controlled by Lunatico Armadillo, ATIK EFW 3, RB Focus Gaius, RB Focus Excalibur.
Dates: 21st Nov. - 23rd Nov. 2024
Frames: (Total)
Astrodon Ha 15 x 600"
Astrodon OIII 15 x 600"
Astrodon SII 15 x 600"
Total integration = 7½ Hours
Center (RA, Dec): (98.113, 4.983)
Center (RA, hms): 06h 32m 27.204s
Center (Dec, dms): +04° 58' 58.243"
Size: 1.63 x 1.9 deg
Radius: 1.253 deg
Pixel scale: 1.63 arcsec/pixel
"Orientation": Up is 90.3 degrees E of N
The cluster and nebula lie at a distance of some 5,000 light-years from Earth and measure roughly 130 light years in diameter. The radiation from the young stars excites the atoms in the nebula, causing them to emit radiation themselves producing the emission nebula we see. The mass of the nebula is estimated to be around 10,000 solar masses.
A survey of the nebula with the Chandra X-ray Observatory has revealed the presence of numerous new-born stars inside optical Rosette Nebula and studded within a dense molecular cloud. Altogether, approximately 2500 young stars lie in this star-forming complex, including the massive O-type stars HD 46223 and HD 46150, which are primarily responsible for blowing the ionized bubble. Most of the ongoing star-formation activity is occurring in the dense molecular cloud to the south east of the bubble.
Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600MM
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera: QHY 5 II
Focal Extender / Reducer: 0.73X
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters: Astrodon Ha (3nm), OIII (3nm) and SII (3nm)
Accessories: Robofocus Focuser controlled by Lunatico Armadillo, ATIK EFW 3, RB Focus Gaius, RB Focus Excalibur.
Dates: 21st Nov. - 23rd Nov. 2024
Frames: (Total)
Astrodon Ha 15 x 600"
Astrodon OIII 15 x 600"
Astrodon SII 15 x 600"
Total integration = 7½ Hours
Center (RA, Dec): (98.113, 4.983)
Center (RA, hms): 06h 32m 27.204s
Center (Dec, dms): +04° 58' 58.243"
Size: 1.63 x 1.9 deg
Radius: 1.253 deg
Pixel scale: 1.63 arcsec/pixel
"Orientation": Up is 90.3 degrees E of N
Sky Map & Finding Chart
SII, Ha & OIII in the full image as captured:
Annotated Image
