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Contains:  M 85, M85, NGC 4382, NGC 4394, NGC4394
Getting plate-solving status, please wait...
M85 + NGC4394 (LRGB) 21 April 2020, 



    
        

            Geof Lewis
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M85 + NGC4394 (LRGB) 21 April 2020

Technical card


Dates:April 20, 2020April 21, 2020

Frames:
Astronomik B 1.25" Type IIc: 7x300" -10C bin 2x2
Astronomik G 1.25" Type IIc: 7x300" -10C bin 2x2
Astronomik L 1.25" Type IIc: 12x600" -10C bin 2x2
Astronomik R 1.25" Type IIc: 7x300" -10C bin 2x2

Integration: 3.8 hours

Darks: ~20

Flats: ~20

Flat darks: ~20

Bias: ~20

Avg. Moon age: 27.64 days

Avg. Moon phase: 4.21%

Bortle Dark-Sky Scale: 3.00

Mean SQM: 21.21


Astrometry.net job: 3509004

RA center: 12h 25' 34"

DEC center: +18° 12' 27"

Pixel scale: 0.855 arcsec/pixel

Orientation: 93.603 degrees

Field radius: 0.236 degrees


Resolution: 1607x1171

Data source: Backyard

Comments

Author

geoflewis
Geof Lewis
License: None (All rights reserved)
1184
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Revisions

  • M85 + NGC4394 (LRGB) 21 April 2020, 



    
        

            Geof Lewis
    Original
  • Final
    M85 + NGC4394 (LRGB) 21 April 2020, 



    
        

            Geof Lewis
    B

B

Description: Levels and NR to try to improve and/or mask the mottled background. It really needs more data when stretching this hard.

Sky plot

Sky plot

Histogram

M85 + NGC4394 (LRGB) 21 April 2020, 



    
        

            Geof Lewis