Cookie consent

AstroBin saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing AstroBin without changing the browser settings, you grant us permission to store that information on your device.

I agree
Getting plate-solving status, please wait...
Horsehead Nebula (starless) imaged in Hydrogen-alpha, 





    
        

            Andrew Klinger

Horsehead Nebula (starless) imaged in Hydrogen-alpha

Technical card

Imaging telescope or lens:William Optics GT-81

Imaging camera:ZWO ASI1600MM-Cool

Mount:Orion Sirius EQ-G (HEQ5)

Guiding telescope or lens:Orion 50 mm Guide Scope

Guiding camera:Orion Star Shoot Auto Guider

Focal reducer:William Optics Flat 6A

Software:Cartes du CielPHD2EQMODPixInsightSequence Generator Pro

Filter:Astrodon Ha 5nm

Accessory:PoleMaster

Resolution: 2561x1884

Dates:Oct. 23, 2017

Frames: 164x300"

Integration: 13.7 hours

Avg. Moon age: 3.44 days

Avg. Moon phase: 12.77%

Astrometry.net job: 2639316

Locations: Backyard, Flower Mound, Texas, United States

Data source: Backyard

Description

I revisited my 2017 Horsehead Nebula data to experiment with new techniques on the Hydrogen-alpha channel. Removing the stars with new software "StarNet" I was able to showcase just how densely packed this area of sky is with dust.

Equipment:
OTA: William Optics GT81 w/0.8x reducer (382mm fl at f/4.7)
Mount: Orion Sirius EQ-G (HEQ-5)
Guidescope: Orion 50mm guidescope
Guiding camera: Orion StarShoot Autoguider
Imaging camera: ZWO ASI1600MM-Cool

Software:
SGP
PHD2
CdC
PixInsight
StarNet

Acquisition:
Location: Flower Mound, TX (Bortle 7)
Dates: 10/23/17, 11/24/17, 12/8/17
Gain: 200 Offset: 50 for Ha
Gain: 76 Offset: 15 for RGB
Camera temp: -20C
Ha: 164x300" Astrodon 5nm
Total integration time: 13hr 40min
64x darks per calibration (master from library)
30x flats per calibration
200x bias per calibration (master from library)

Preprocessing:
Batch PreProcessing script to generate calibrated images
StarAlignment to register all frames to the reference
LocalNormalization of all registered frames
ImageIntegration
DrizzleIntegration
DynamicCrop
DBE

Ha Processing:
Deconvolution
TGV Noise Reduction
ArcsinhStretch
HistogramTransformation
Used external software "StarNet" to remove stars
PIxelMath expression "1-(1-$T)*(1-$T)" to push fainter nebulosity
LocalHistogramTransformation
MultiscaleLinearTransform sharpening
Resampled to 30% for web posting

Comments

Author

ak_astro
Andrew Klinger
License: None (All rights reserved)
3785
Like

Revisions

  • Final
    Horsehead Nebula (starless) imaged in Hydrogen-alpha, 





    
        

            Andrew Klinger
    Original
  • Horsehead Nebula (starless) imaged in Hydrogen-alpha, 





    
        

            Andrew Klinger
    B

B

With stars

Histogram

Horsehead Nebula (starless) imaged in Hydrogen-alpha, 





    
        

            Andrew Klinger

In these public groups

Narrowband imaging