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Re: Stellarium for sight reduction math practice?
From: Sean C
Date: 2014 Sep 4, 13:15 -0700
From: Sean C
Date: 2014 Sep 4, 13:15 -0700
I'm assuming I don't have to do any sextant corrections if I use the apparent versus the geometric values for Stellarium's "Alt" generate my Ho? Is the only difference between the two that the apparent incorporates refraction (A2 Tables of the NA)?
Thanks, Dale
Dale,
Yes, that seems to be the case. However, I think you'll still need to use the parallax correction where applicable, but not the semi-diameter correction.
Just the other day I was watching the "moon" get flattened by the atmosphere as it approached the horizon. Curiously, after it had dropped below the horizon, it became quite elongated. I wonder if that's really what one would see if the ground were transparent.
-Sean C.
