Hemisphere:  Southern  ·  Constellation: Serpens (Ser)  ·  Contains:  Eagle Nebula  ·  IC 4703  ·  M 16  ·  NGC 6611  ·  Star Queen
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M16 Eagle Nebula, 



    
        

            Mark Wetzel
M16 Eagle Nebula
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M16 Eagle Nebula

Getting plate-solving status, please wait...
M16 Eagle Nebula, 



    
        

            Mark Wetzel
M16 Eagle Nebula
Powered byPixInsight

M16 Eagle Nebula

Technical card

Imaging telescopes or lenses: Celestron C9.25 Edge HD

Imaging cameras: ZWO ASI 1600MM-Pro Cool

Mounts: Celestron CGEMⅡ

Guiding telescopes or lenses: Celestron C9.25 Edge HD

Guiding cameras: ZWO 174MM Mini

Focal reducers: Celestron 0.7x Focal Reducer

Software: Celestron CPWI  ·  Main Sequence Software Seqence Generator Pro 3  ·  Pleiades Astrophoto PinInsight  ·  Adobe Photoshop CC 2020  ·  PHD 2

Filters: ZWO 36mm 7nm OIII  ·  ZWO 36mm 7nm Ha  ·  ZWO 36mm 7nm SII  ·  ZWO 36mm Red  ·  ZWO 36mm Green Filter  ·  ZWO 36mm Blue Filter

Accessory: Celestron OAG


Dates:July 10, 2020July 11, 2020July 14, 2020July 15, 2020

Frames:
ZWO 36mm 7nm Ha: 42x300" (3h 30') (gain: 139.00) -10C bin 1x1
ZWO 36mm 7nm OIII: 42x300" (3h 30') (gain: 139.00) -10C bin 1x1
ZWO 36mm 7nm SII: 37x300" (3h 5') (gain: 139.00) bin 1x1
ZWO 36mm Blue Filter: 43x60" (43') (gain: 76.00) -10C bin 1x1
ZWO 36mm Green Filter: 44x60" (44') (gain: 139.00) -10C bin 1x1
ZWO 36mm Red: 43x60" (43') (gain: 76.00) -10C bin 1x1

Integration: 12h 15'

Darks: ~50

Flats: ~50

Flat darks: ~50

Avg. Moon age: 22.16 days

Avg. Moon phase: 49.85%

Bortle Dark-Sky Scale: 2.00


Basic astrometry details

Astrometry.net job: 3823741

RA center: 18h 18' 52"

DEC center: -13° 48' 0"

Pixel scale: 1.334 arcsec/pixel

Orientation: 18.321 degrees

Field radius: 0.367 degrees


Resolution: 1575x1200

Locations: Coast Range Remote Site, Walton, Oregon, United States

Data source: Traveller

Description

This was my first attempt to image an emission nebula with narrowband filters, Hydrogen-alpha (Ha), Oxygen-III and Sulfur-II. I also took short exposures with Red, Green and Blue filters to capture the natural color of the stars. The final result is a false color image that combines Ha and S-II in the red channel, Ha and O-III in the green channel and O-III in the blue channel. The star color image was blended with the false color image to produce the final result. The remaining issue is that the faint, small stars are tinted blue. The RGB star color image used short exposure to prevent clipping too many of the bright stars, and the total exposure time was limited, so the faint stars could not be corrected properly.

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