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Contains:  NGC 1097
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NGC 1097 from the suburbs, 



    
        

            DiscoDuck
NGC 1097 from the suburbs
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NGC 1097 from the suburbs

Technical card


Dates:Oct. 20, 2019Oct. 23, 2019Oct. 26, 2019Oct. 27, 2019Oct. 28, 2019Nov. 16, 2019Nov. 17, 2019Nov. 18, 2019Nov. 21, 2019Nov. 22, 2019Nov. 23, 2019

Frames:
ZWO New B 1.25": 60x180" (gain: 139.00) -20C bin 1x1
ZWO New G 1.25": 62x180" (gain: 139.00) -20C bin 1x1
ZWO New L 1.25": 2247x60" (gain: 139.00) -20C bin 1x1
ZWO New R 1.25": 61x180" (gain: 139.00) -20C bin 1x1

Integration: 46.6 hours

Avg. Moon age: 21.47 days

Avg. Moon phase: 34.99%

Mean FWHM: 2.77


Basic astrometry details

Astrometry.net job: 3108467

RA center: 2h 46' 18"

DEC center: -30° 16' 30"

Pixel scale: 0.655 arcsec/pixel

Orientation: 306.120 degrees

Field radius: 0.398 degrees


Resolution: 3579x2517

Locations: Home, Golden Grove, South Australia, Australia

Data source: Backyard

Description

Tried a bit of an experiment to see if, with enough data, a decent image could be obtained under light pollution. A quick calculation suggested that about 7x more data was needed than in a dark sky site - so about 40 hours or so should be the same as one night at a dark site.

The experiment is not conclusive without doing the same object at a dark site! But even after 40+ hours of data, there is still a lot of noise in this image and not great detail - though admittedly some nights the seeing was appalling.

I think maybe I'll stick more to narrowband in the suburbs and keep the LRGB for dark sky site trips.

Comments

Author

DiscoDuck
DiscoDuck
License: None (All rights reserved)
1762
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Revisions

  • NGC 1097 from the suburbs, 



    
        

            DiscoDuck
    Original
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    B
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    C
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    D
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    E
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    F
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    G
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    H
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    I
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    J
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    K
  • Final
    NGC 1097 from the suburbs, 



    
        

            DiscoDuck
    L

I

Description: Tweaked background a bit

J

Description: Redid core using sharper subs only.

K

Description: Colour balance.

L

Description: SCNR

Sky plot

Sky plot

Histogram

NGC 1097 from the suburbs, 



    
        

            DiscoDuck