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Contains:  Triangulum galaxy, M 33, NGC 598
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M33 (Triangulum Galaxy), 


            Joel Shepherd
M33 (Triangulum Galaxy)

M33 (Triangulum Galaxy)

Technical card

Resolution: 1600x1293

Dates:Sept. 26, 2017Sept. 27, 2017Oct. 16, 2018

Astrodon 5nm H-alpha: 12x600" bin 1x1
Baader Planetarium B 1.25": 14x180" bin 1x1
Baader Planetarium B 1.25": 16x300" bin 1x1
Baader Planetarium G 1.25": 12x180" bin 1x1
Baader Planetarium G 1.25": 18x300" bin 1x1
Baader Planetarium R 1.25": 12x180" bin 1x1
Baader Planetarium R 1.25": 18x300" bin 1x1

Integration: 8.2 hours

Avg. Moon age: 6.64 days

Avg. Moon phase: 42.22%

Bortle Dark-Sky Scale: 6.00 job: 2459216

RA center: 1h 33' 50"

DEC center: +30° 39' 39"

Pixel scale: 2.715 arcsec/pixel

Orientation: 294.688 degrees

Field radius: 0.776

Locations: Home, Seattle, WA, United States

Data source: Backyard


I captured about four more hours of RGB and Ha data on M33 this past October, and combined it with the RGB data I captured the previous year. This is the result. It is stretched somewhat less than my earlier effort, and although the nebulosity is more subtle, I actually like this rendition more. Triangulum is faint and I have to believe that any appreciable distance it would appear to be a structured mist more than a bright gleaming oval ... but that's just my interpretation.



Joel Shepherd
License: Attribution Creative Commons

Sky plot

Sky plot


M33 (Triangulum Galaxy), 


            Joel Shepherd

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Suburban Astrophotography