Hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  56 Cyg  ·  57 Cyg  ·  B349  ·  IC 5070  ·  NGC 6989  ·  Pelican Nebula  ·  The star 56Cyg  ·  The star 57Cyg
Getting plate-solving status, please wait...
IC5070 Pelican Nebula, 



    
        

            Jason
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IC5070 Pelican Nebula

Getting plate-solving status, please wait...
IC5070 Pelican Nebula, 



    
        

            Jason
Powered byPixInsight

IC5070 Pelican Nebula

Imaging telescopes or lenses: Skywatcher Evostar 80ED DS-Pro

Imaging cameras: ASI ZWO ASI1600 MM Pro Cooled

Mounts: Skywatcher HEQ5 PRO (belt modification)

Guiding telescopes or lenses: Skywatcher 50mm Finder Scope

Guiding cameras: QHYCCD QHY5-II Mono

Focal reducers: Skywatcher 0.85x Focal Reducer 80ED

Software: Pleiades PixInsight  ·  KStars Ekos/INDI, Astroberry

Filters: ZWO OIII 31 mm 7 nm  ·  ZWO SII 31mm 7nm  ·  ZWO Ha 31mm 7nm

Accessory: ZWO EFW 1.25 8 Position  ·  ZWO EAF Electronic Auto Focuser


Dates:June 22, 2020June 25, 2020June 29, 2020

Frames:
ZWO Ha 31mm 7nm: 36x600" (6h) (gain: 139.00) -15C bin 1x1
ZWO OIII 31 mm 7 nm: 23x600" (3h 50') (gain: 139.00) -15C bin 2x2
ZWO SII 31mm 7nm: 26x600" (4h 20') (gain: 139.00) -15C bin 2x2

Integration: 14h 10'

Darks: 100

Flats: 50

Flat darks: 100

Avg. Moon age: 4.73 days

Avg. Moon phase: 28.24%

Bortle Dark-Sky Scale: 5.00


Astrometry.net job: 3729244

RA center: 20h 51' 3"

DEC center: +44° 24' 10"

Pixel scale: 1.495 arcsec/pixel

Orientation: -1.437 degrees

Field radius: 1.181 degrees


Resolution: 3401x4551

Data source: Backyard

Description

Weighted batch preprocessor with cosmetic correction, all subs aligned to the best in their filter.

(Selected bottom-up FITS)

Sub-frame selector, reject anything with score less than 67, approved subs separated out into own directory.

1x1 = 1.5 arcsec/pixel

2x2 = 2.99 arcsec/pixel

Gain 0.652

12bit camera res

Ha IC_5070_Light_H_Alpha_600_secs_2020_06_22T00_57_53_006_c_cc

OIII IC_5070_Light_OIII_600_secs_2020_06_26T00_28_51_008_c_cc

SII IC_5070_Light_SII_600_secs_2020_06_29T01_32_37_006_c_cc

Best sub from each filter then used as reference for Alignment and Local Normalisation.

Integration using SSWEIGHT from sub-frame selection for Sub Weights

Muredenoise of integrated images cycle-spin = 48

Gain 1x1 = 0.06

Gain 2x2 = 0.240

Gaussian Noise 2x2 = 24.99 (OIII & SII)

Gaussian Noise 1x1 = 50.65 (Ha)

Combination count SII = 26, OIII= 23 Ha=36

ABE of integrated images subtraction then division.

Align integrated imaged to the best Ha sub

Linear fit to SII (lowest median, can only do at this stage after images resize to Ha size)

dynamic crop on all

channel combination SII,Ha,OIII

correct magenta stars script (amount = 0.

90deg clockwise rotation

STF & Histogram stretch

Curves transformation Saturation, L, a, b and c

Luminance mask applied to mask large cloud and expose the 'pool'

Multilayertransform 4 layers, 2,3&4 = +0.1 to sharpen slightly

Curves tweek with same mask

Inverted mask

Curves tweek (L) to bring out dust cloud detail

Comments

Sky plot

Sky plot

Histogram

IC5070 Pelican Nebula, 



    
        

            Jason