Hemisphere:  Southern  ·  Constellation: Canis Major (CMa)  ·  Contains:  16 CMa)  ·  The star Udra (ο1 CMa
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Dolphin Head Nebula, 



    
        

            Wael Omar WO
Dolphin Head Nebula
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Dolphin Head Nebula

Getting plate-solving status, please wait...
Dolphin Head Nebula, 



    
        

            Wael Omar WO
Dolphin Head Nebula
Powered byPixInsight

Dolphin Head Nebula

Equipment

Imaging Telescopes Or Lenses
William Opticas Red Cat 51
Imaging Cameras
zwo ASI 294 mm PRO
Mounts
Sky-Watcher EQM 35 Pro
Filters
ANTILA 3.0 nm Ha · OPTOLONG Oiii 6.5nm
Software
PS Photoshop · NINA · PHD2 · PIxInsight
Guiding Telescopes Or Lenses
ZWO 30mm f/4 mini guide scope
Guiding Cameras
zwo 174 mm

Acquisition details

Frames:
ANTILA 3.0 nm Ha: 5x1200" (1h 40') (gain: 121.00) -20°C bin 2x2
ANTILA 3.0 nm Ha: 16x300" (1h 20') (gain: 121.00) -20°C bin 2x2
ANTILA 3.0 nm Ha: 22x600" (3h 40') (gain: 121.00) -20°C bin 2x2
OPTOLONG Oiii 6.5nm: 32x300" (2h 40') (gain: 121.00) -20°C bin 2x2
OPTOLONG Oiii 6.5nm: 12x600" (2h) (gain: 121.00) -20°C bin 2x2
Integration:
11h 20'
Darks:
40
Flats:
25
Flat darks:
25
Bortle Dark-Sky Scale:
5.00

Basic astrometry details

Astrometry.net job: 5713896

RA center: 06h54m45s.6

DEC center: -23°3903

Pixel scale: 1.928 arcsec/pixel

Orientation: 67.554 degrees

Field radius: 1.781 degrees

Resolution: 4444x4951

Locations: Cairo , EGYPT, Cairo Governorate, Egypt; Fayoum , EGYPT, Faiyum Governorate, Egypt

Data source: Traveller

Description

This is the hardest target i 've ever imaged since i start this hobby . Its a very faint nebula just above the horizon by 36 degrees and few hours to capture every night.
I traveled around 1000 km to capture this Nebula in Bortle 9 , 4 ,2 regions to catch enough Data for it.
Dolphn Head nebula is HII region in Canis major constellation. The nebula is the Blue Bubble around the yellow star of a type " Wolf Rayet " and called EZ Canis major , This wolf rayet star have completely lost their outer hydrogen and are fusing helium or heavier elements in the core. Their spectra showing prominent broad emission lines of ionised helium and highly ionised nitrogen or carbon and so have very high surface temp around 89000 Kelvin.This star is in the brief, pre-supernova phase of its stellar evolution.
The Nebula is about 4900 Light years from earth ,its  HII region blown by stellar winds up to 1,700 km/s and ionized by the intense UV radiation.
I pushed my gears so hard to get most of the nebula and reach 1200 seconds of exposure / frame. I stack most of the frames but remove some taken in bortle 9 because the LP gradients were so heavy that wash out details of the cleaner frames in Bortle 2 after stacking.

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