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Contains:  Helix nebula, NGC 7293
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NGC1793 / Helix Nebula, 





    
        

            KiwiAstro
NGC1793 / Helix Nebula

NGC1793 / Helix Nebula

Technical card

Resolution: 1260x824

Dates:Oct. 23, 2019Oct. 29, 2019

Frames:
Astronomik H-alpha 12nm CCD 2": 5x120" (gain: 285.00) -15C bin 2x2
Explore Scientific UHC UHC Nebula Filter: 11x300" (gain: 120.00) -15C bin 2x2
Explore Scientific UHC UHC Nebula Filter: 6x600" (gain: 120.00) -15C bin 2x2

Integration: 2.1 hours

Darks: ~3

Flats: ~5

Flat darks: ~5

Avg. Moon age: 12.88 days

Avg. Moon phase: 15.37%

Bortle Dark-Sky Scale: 2.00

Mean FWHM: 1.90

Temperature: 11.00

Astrometry.net job: 3017349

RA center: 337.432 degrees

DEC center: -20.828 degrees

Pixel scale: 3.404 arcsec/pixel

Orientation: 289.022 degrees

Field radius: 0.712 degrees

Locations: Backyard, Kerikeri, Northland, New Zealand

Data source: Backyard

Description

Captured the Helix Nebula using a mix of 10 minute (UHC), 5 minute (UHC) and 2 minute (HA) subs attempting to bring out more detail than in my first photos at shorter exposures.

Still new at guiding although it seems to work relatively well for subs exposure this long.

Subs (UHC filter): 6 x 600s, 11 x 300s, 1 x 90s - all at gain 120, camerai cooled to -15C (23/10/2019)
Subs (HA filter) : 4 x 120s, gain 285, camera cooled to -15C (29/10/2019)

Calibration/stacking/processing in Pixinsight and slight curve/level adjustments in Photoshop. HA applied as luminance layer in Photoshop.

First time using an HA filter - some learning in progress on how best to use.

Comments

Author

KiwiAstro
KiwiAstro
License: None (All rights reserved)
1030
Like

Revisions

  • NGC1793 / Helix Nebula, 





    
        

            KiwiAstro
    Original
  • Final
    NGC1793 / Helix Nebula, 





    
        

            KiwiAstro
    B

B

Added HA data from 29 Oct 2019 / can see some slight improvements in contrast and especially centre of the eye. Applied as a luminance layer after processing of HA in pixinsight.

Sky plot

Sky plot

Histogram

NGC1793 / Helix Nebula, 





    
        

            KiwiAstro