Found m33 ok but having trouble with m27 and 57 in my small city skies with my 100ed scope. Are they sensitive to pollution?
Seeing m27 and m57
Started by jerome hayes, 10/26/2013 08:12PM
Posted 10/26/2013 08:12PM
Opening Post
Posted 10/26/2013 09:52PM
#1
jerome hayes said:
Found m33 ok but having trouble with m27 and 57 in my small city skies with my 100ed scope. Are they sensitive to pollution?
M33 is much more difficult than M57 and M27. If you can see M33 (not M31) then M57 and M27 should be a piece of cake and just require proper positioning. Both are visible in an 80mm from my urban backyard under a full moon.
M57 is small so it requires some magnification if you don't have an eye for small objects. M27 is large and visible with binoculars (10x50s for sure) from my back yard.
Jon
Posted 11/07/2013 02:26PM
#2
M33 would be a more difficult target than M27 or M57 from a suburban or urban area. I'm wondering if you saw M31, Andromeda galaxy? M33 would appear round in shape and very dim and diffuse, with little detail. M31 is elongated, bright, and with a very bright core. M27 is bright, but much smaller in size than either M31 or M33, so it can be easily overlooked if you have not spotted it before. M57 is a little dimmer than M27 and quite a bit smaller in size, medium powers are usually needed to spot it as at low power it can appear star-like (although M57 will tend to "blink out" when you try to look directly at it). Both these planetaries are visible in suburban skies with a 4" scope, but if you are urban try an O-III or broadband light pollution filter like the Orion Skyglow.
David E
David E
Funding Member
