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    Re: Modern Lunars
    From: Paul Hirose
    Date: 2016 Sep 24, 21:46 -0700

    On 2016-09-24 0:03, Antoine Couëtte wrote:
    >
    > But first of all, one more question to fully clarify this point: *do you 
    apply in your Lunar Software the Moon correction which I am using and to 
    which I refered under the following terms in* 
    http://fer3.com/arc/m2.aspx/Modern-Lunars-Couëtte-sep-2016-g36570 **:*
    >
    > QUOTE* - For the Moon, corrections of *Δλ = +0.50”* and *Δβ = -0.25”* have 
    been added to the Mean Ecliptic of Date Coordinates to approximately account 
    for correction from Center of Mass (from ***INPOP13C***) to Center of Figure. 
    Such corrections translate here into: ***Δα = +0.478”*** and ***Δδ = 
    -0.351”***.  *UNQUOTE
    > *?*
    
    I applied the above Moon correction for center of figure. All values are
    decimal degrees. I decided to not show azimuth residuals, because the
    same number can be significant, or insignificant, depending on altitude.
    Therefore, the "Moon" and "Sun" columns are the separation angles
    between the *unrefracted* body centers that Kermit and I compute.
    
    The "alt" columns are the difference in refracted lower limb altitudes
    (Kermit - me). The "dist." column is the difference in refracted limb to
    limb distance (Kermit - me).
    
    Moon     alt    Sun     alt     dist.
    0.0002  0.0000 0.0001 +0.0012 -0.0008  #2 sea level
    0.0002  0.0000 0.0001 +0.0012 -0.0008  #2 400 meters
    
    0.0002 +0.0001 0.0001 +0.0002  0.0000  #3 sea level
    0.0002 +0.0001 0.0001 +0.0002 -0.0001  #3 400 meters
    
    0.0002 -0.0003 0.0002 +0.0001 -0.0001  #4 sea level
    0.0002 -0.0003 0.0002 +0.0001 -0.0001  #4 400 meters
    
    Kermit's table appears to have two typos:
    #3 sea level unrefracted Sun center altitude should be 1° greater.
    #4 Moon azimuth should be 1° greater.
    
    Those are in a private communication; I don't think the numbers were
    included in the table posted to the group.
    
    

       
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