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Michael A. Stecker
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Dark Nebulae Sky-Watcher Quattro 250P Askar 103 APO C-11 images My Astrobin Gallery |
 Propeller Nebula, DWB 111/119 in Cygnus Photographed with Hubble Palette (false color) where Sulfur-II is designated red, Hydrogen-alpha is designated green & Oxygen-III is designated blue This cropped image of the Propeller Nebula, DWB111/119, in Cygnus, not far from the star Deneb was a joint project of James Foster and me using my Celestron C-11 telescope at f/7. The photo was shot using a monochrome camera with filters of the Hubble Palette: Hydrogen-alpha (assigned green color), Oxygen-III, (assigned blue color) Sulfur-II (assigned red color). In the photo the orange-yellow colors represent light emitted from hydrogen and sulfur, while the blue is from Oxygen. The total exposure time was just under 21-hours. file: PropellerNebHubblePAL2A-cro4cr1rot3.jpg Click here for higher resoloution image .
Photographic Data
Date: June-July, 2025 telescope: Celestron black tube C-11 at f/7 Apereture: 11-inch (2,795 mm) Focal Ratio: f/7.2 FL with 0.72 focal reducer= 2011 mm cropped photo
mount:
iOptron CEM60 imaging camera: ZWO ASI6200MM-Pro monochrome camera with Hydrogen-alpha, Oxygen-III, & Sulfur-II filters exposure & filters: Filters used for Hubble Pallette: Hydrogen-alpha (assigned green color), Oxygen-III (assigned blue color), Sulfur-II (assigned red color) shot with a monochrome camera The exposures were 364, 400, & 476 minutes in SII, H-a, & OIII, respectively Total exposure time just under 21-hours. processing ASI Studio and Adobe Photoshop Elements photographic site: Pinon Pines Estates (Frazier Park California) (Bortle 4 at 5,500 ft elevation)  Propeller Nebula, DWB 111/119 in Cygnus Photographed with Hubble Palette Wider field of view in horizontal mode file: PropellerNebHubblePAL2A-cro6sm.jpg Click here for higher resoloution image |
 Propeller Nebula, DWB 111/119 in Cygnus Photographed with Hydrogen-alpha, Oxygen-III and RGB filters (traditional H-alpha, Oxygen-III & RGB, version 2) Same as above with C-11, but not Hubble palette. Hydrogen-alpha is red and Oxygen-III blue. file: PropellerNeb-RGB2&HOO2&SHO-2arot1aasm.jpg Click here for higher resoloution image .
Photographic Data
Date: June-July, 2025 telescope: Celestron black tube C-11 at f/7 Apereture: 11-inch (2,795 mm) Focal Ratio: f/7.2 FL with 0.72 focal reducer= 2011 mm cropped photo
mount:
iOptron CEM60 imaging cameras: ZWO ASI6200MM-Pro monochrome camera with H-alpha, Oxygen-III& RGB filters exposure & filters: RGB (abt 60, 60, 60 min each) with HA&OIII (similar to above). processing ASI Studio and Adobe Photoshop Elements photographic site: Pinon Pines Estates (Frazier Park California) (Bortle 4 at 5,500 ft elevation)  Propeller Nebula, DWB 111/119 in Cygnus Photographed with Sky-Watcher Quattro 250P (10-inch f/4 Newtonian telescope) and ZWO ASI6200MC-Pro COLOR camera (cropped image) . The color camera without narrow band filters does not show the blue from excited Oxygen-III light file: PropellerNeb193min2lessSTARSautoCOLOR-1acr1asm.jpg Click here for higher resoloution image
Photographic Data
Date: July, 2025 telescope: Sky-Watcher Quattro 250P (10-inch f/4 Newtonian telescope) aperture: 250 mm (10-inches) Focal Ratio: f/4 Focal Length: 1,000 mm cropped photo
mount:
iOptron CEM60 imaging cameras: ZWO ASI6200MC-Pro COLOR astrocamera exposure: total: 193 minutes (3.2 hours) processing ASI Studio and Adobe Photoshop Elements photographic site: Pinon Pines Estates (Frazier Park California) (Bortle 4 at 5,500 ft elevation) |
