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M-74 is a medium sized but dim galaxy. You see it almost face on, but at magnitude 10.0 you probably need at lease a 6-inch scope. It's surface brightness is very dim at magnitude 13.7 (Similar to the planet Pluto). This makes it a difficult object to view or image unless you have very dark skies. You probably can see the central core as a slightly fuzzy star, somewhat like the appearance in the wide field film image. | |
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Size: 10.5 x 9.5 arcmin Magnitude: 10.0 Surface Brightness: 13.7 RA: 01h 36m 41.7s Dec: 15 d 47m 00s |
M-74 is the faint patch of light just left of center. East West FOV is about 1.4 degrees. Limiting magnitude of this image is about 12. |
Scope: 90 mm Orion MAK 500 |
Nikon Film Back w/ Kodak MAX 800 Film | |
Focal ratio: f5.5 | |
Exposure: 40 min | |
This image was taken 9 Feb 2002, at about zero hours UT. I measured the brightness with the Astro Art Photometry routine as magnitude 12.0. |
Scope:
8" LX 200 SCT
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MX-5C CCD Camera,
IDAS LPR Filter & STAR 2000
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Focal Ratio:
f4.8
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Exposure:
50 min
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Scope:
8" LX 200 SCT
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MX-5C
CCD Camera, IDAS LPR Filter & STAR 2000
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Focal
Ratio: f10
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Exposure:
120 min
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Comparing this image with the one above it shows the difference exposure can make on a dim galaxy. The longer exposure picks up much fainter areas of the galaxy and more detail in the dust lanes and knots.
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Scope:
8" LX 200 SCT
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M-5C
CCD Camera
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Focal
Ratio: f10
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Exposure:
45 min
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