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Contains:  M 1, Crab nebula, NGC 1952
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M1 in HOS, 


            Joel Shepherd
M1 in HOS

M1 in HOS

Technical card

Resolution: 1025x1025

Dates:Nov. 20, 2019Nov. 28, 2019Nov. 29, 2019Dec. 25, 2019

Astrodon 5nm H-alpha: 18x600" -20C bin 1x1
Astrodon 5nm Olll: 18x600" -20C bin 1x1
Astrodon 5nm SII: 18x600" -20C bin 1x1
Baader Planetarium B 1.25": 7x180" -20C bin 1x1
Baader Planetarium G 1.25": 3x180" -20C bin 1x1
Baader Planetarium R 1.25": 10x180" -20C bin 1x1

Integration: 10.0 hours

Avg. Moon age: 14.13 days

Avg. Moon phase: 14.32%

Bortle Dark-Sky Scale: 6.00 job: 3183767

RA center: 5h 34' 31"

DEC center: +22° 0' 46"

Pixel scale: 1.090 arcsec/pixel

Orientation: 351.241 degrees

Field radius: 0.219

Locations: Home, Seattle, WA, United States

Data source: Backyard


Messier 1 isn't considered a difficult target, but in Seattle it is elusive. The weather generally conspires against it, to the point that this is the first time in 4 years that we've gotten a break when it was in good position. Even then, thick fog ruined or cut short several nights.

Colors were more challenging than I expected. This is a fairly straightforward HOS combination with RGB stars.



Joel Shepherd
License: Attribution Creative Commons

Sky plot

Sky plot


M1 in HOS, 


            Joel Shepherd