M108 and 97
Posted 03 February 2013 - 01:00 AM
Posted 03 February 2013 - 02:19 AM
Posted 03 February 2013 - 04:22 AM
All you need is some really dark skies. Then you see them easily.
Posted 03 February 2013 - 09:48 AM
Also, I find that the sweet spot for me for DSO (galaxies, nebulae) with my 6" is a 3mm exit pupil. For any 6" scope that would be any eyepiece that gives 50X, or close to it. Here's a link to the Celestron web page that explains it simply and easily. Hope that helps.
Posted 03 February 2013 - 11:34 AM
Posted 03 February 2013 - 01:29 PM
Posted 03 February 2013 - 01:56 PM
Posted 03 February 2013 - 10:01 PM
Posted 04 February 2013 - 06:28 AM
So I'm out viewing tonight as I got a clear night and I don't have to get up in the morning. I'm using the 6" and it appears that M108 and 97 are visable using averted vision only. I think I'm in a yellow zone. They were about 50 degrees above the horizon. So I guess I need a darker site????
I must admit I'm a little surprised; I would expect them to appear more prominent in the yellow zone through a 6-inch scope. My first notes on M97 -- through a 7-inch scope in a yellow/green zone -- describe it as "bright" at 120X. M108 is definitely harder.
Obviously, darker skies always help.
Posted 04 February 2013 - 06:35 AM
In magnitude 6 or better I can see both with an 8" sct or reflector. I wouldnt even dream of it in a magnitude 5 sky.
My notes through my 7-inch scope at my local city park, NELM around 4.7, say:
M108: OK @40X, slightly better @60X or 80X. Vague sense elliptical EW.
M97: really obvious with UHC filter @40X, substantial fairly bright circle. Just barely visible @60X without UHC, impossible other powers.
Posted 04 February 2013 - 10:10 AM
Posted 04 February 2013 - 10:06 PM
Posted 04 February 2013 - 11:46 PM
M97 under mag 6.2v sky's for me seemed to max out at 120x and 70x was pretty good - both either UHC or OIII if I recall. I never never never saw the eyes though. I tried - a lot. Finally at a similar sky with a 17.5" while it was visible i stopped kicking myself for missing it with the 8".
I feel like a spoiled brat then . You gotta come out to the Southwest Deserts Pete ! My first trip out to Joshua Tree with my AR5 , the "eyes" were unbelievably present . I had no filters at the time . I recall using 120x on that .
You should see Androneda through the SN8 at 31x ! Unreal! ...And the Triangulum at about 50 to 60x . It'll knck you socks off ! .....Heck , it might even blow your hair back .
But seriously , I feel fortunate when I read through some of these threads . The arid Southwest really is telescope country .
You can't get a better filter than the dark sky location filter .
Josh Tree is like a green/blue zone . Now in Arizona , up on the Coconino plateau , it's more a grey/black zone at the county line 40 minutes out of Kingman .
Posted 05 February 2013 - 01:13 AM
Posted 05 February 2013 - 01:32 AM