Below: Original from Jan ´24 & Above is the latest version done in Sept. ´24
SH2-284
Sh2-284 is a HII star forming region of gas and dust located in the constellation Monoceros approximately 15 thousand light years from the Earth. This remarkable nebula resembles the more familiar Rosette Nebula (Caldwell 49). Along the edges of Sh2-284 are several "elephant trunk" formations. These are monstrous pillars of gas and dust that stretch into the central void of the nebula. Perhaps the most prominent of the pillars is located to the left center. It resembles the forefinger of a hand pointing to the stars in the center of the nebula. These pillars are formed by intense radiation and stellar winds radiating from the very hot stars of the central open cluster designated Dolidze 25. The radiation and wind from the cluster is responsible for clearing the central void in the surrounding nebula. Dolidze 25 is a very young cluster with an estimated age of approximately 3 to 4 million years.
Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600mm
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera: QHY 5 II
Focal Extender / Reducer: None
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters: Astrodon SII (3nm), Ha (3nm) & OIII (3nm),
Accessories: Robofocus Focuser controlled by Lunatico Armadillo, ATIK EFW 3, RB Focus Gaius, RB Focus Excalibur.
Dates: 22nd. Dec 2023 - 1st Jan 2024
Frames:
Astrodon SII 42 x 10'
Astrodon Ha 84 x 10'
Astrodon OIII 30 x 10'
Total integration = 26 Hours.
Center (RA, Dec):(101.530, 0.345)
Center (RA, hms):06h 46m 07.312s
Center (Dec, dms):+00° 20' 42.488"
Size:1.89 x 1.26 deg
Radius:1.139 deg
Pixel scale:1.2 arcsec/pixel
Orientation:Up is 178.4 degrees E of N
Imaging telescope: Takahashi FSQ130ED
Imaging camera: ASI 2600mm
Mount: JTW Trident P75
Guiding telescope: Takahashi FS60CB
Guiding camera: QHY 5 II
Focal Extender / Reducer: None
Software: Sequence Generator Pro SGP (for capture) PHD 2 (guiding), Astro Pixel Processor, PixInsight.
Filters: Astrodon SII (3nm), Ha (3nm) & OIII (3nm),
Accessories: Robofocus Focuser controlled by Lunatico Armadillo, ATIK EFW 3, RB Focus Gaius, RB Focus Excalibur.
Dates: 22nd. Dec 2023 - 1st Jan 2024
Frames:
Astrodon SII 42 x 10'
Astrodon Ha 84 x 10'
Astrodon OIII 30 x 10'
Total integration = 26 Hours.
Center (RA, Dec):(101.530, 0.345)
Center (RA, hms):06h 46m 07.312s
Center (Dec, dms):+00° 20' 42.488"
Size:1.89 x 1.26 deg
Radius:1.139 deg
Pixel scale:1.2 arcsec/pixel
Orientation:Up is 178.4 degrees E of N
Sky Map & Finder Chart
SII, Ha & OIII in the image:
Annotated Image
