Gold Mtn Observing Center
Apr 11 2007, 12:20 PM
QUOTE(dbeckstrom @ Apr 10 2007, 09:42 PM)
I'm hoping to get out next week and get back to work on the observatory. So my thought is to measure the height of the cement pier above the floor. Then measure the height from the top of the cement pier to the top of the dome. And also to measure the height from the top of the cement pier to the bottom of the shutter slit. Are those the key measurements I need to compute the height that I will need for the steel pier that I will build to sit on top of the cement pier? I also assume that I will need to know the height from the bottom of the paramount mount to the end of the telescope when it points straight up? Won't the key be to make sure the telescope doesn't hit the roof of the dome?
It would make sense to know the actual distance the scope mounted, aiming at zenith will be. The over-all distance from dew cap to the bottom plate of the Paramount will let you know the distance you have to work with for the steel pier extension.
The hight of the dome doesn't change, and niether does your cement pier hight.
The only factor you have to work with is the steel extension length.
I gave up on any dome OB for my scope, since my pier elevates over 45".
For the dome to clear the Dew cap, it would need to be over 15' tall...inside.
And at the lower level, the dome opening would be too high to see anything close to the horizon. I don't do ladders.