NavList:

Kermit, Sean, Frank:

In my note to Sean [1], I use my HP calculator program version and input Sean's altitude corrections for moon and Aldebaran rather than mine. Sean used NA published equations to compute them, I used the NA tables to look them up.

After using Sean's altitude correction values [2], I get the same A, B and cleared lunar values as he does but our Q values differed a lot. Both our Q values were very small and seemed not to have affected our final cleared lunar value. 

But, why such difference computed Q values?  When I comparing Sean's Q equation with my calculator equation, I find that I had used

the ATAN function rather than COTAN as he did.  I changed ATAN to COTAN and reran:

      Q = .55*ACm^2*(1./TAN(LDpc))*(1.0-A^2)/3438.  Where x^2 denotes squared and COTAN is 1./TAN(x) 

Our values for A, B, Q and final cleared lunar now agree completely.

I am having a small vacation and do not have access to my notes from Frank's lunars workshop. I'm curous as to why I used ATAN rather than COTAN in my Q equation. But even with ATAN, many other lunars test cases agree very well with results published elsewhere but computed by different methods. 

Ed

------------------------------------------------------------------------------------------------------------------------

[1] fer3.com/arc/m2.aspx/First-MoonStar-Lunar-EdPopko-dec-2017-g41062

[2] fer3.com/arc/m2.aspx/First-MoonStar-Lunar-SeanC-dec-2017-g41056