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Hello all, on the 14 Oct 2023 ( Although NZ beat you all by being 13 hours ahead of UTC ;-)

Firstly, I must say that it was very pleasing to see that Paul_H and I agree *exactly* on when the SunLL is occulted and then exposed - by using different methods.

Thanks Paul, I guess that means we need to be slightly suspicious of Stellarium's precision.

Kermit and Paul, I'm confused why you think there would be no difference between a "Standard Atmosphere" and an "Airless model" for predicting when an eclipse occurs or finishes.

I have copied below the raw input data to see if that helps understand that *different* input data, will give *different* outcome. 

2023-Oct-14 18:51:10.5 = Last touch of the Moon with the Sun (using Standard Refraction model).

2023-Oct-14 18:51:08.5 = Last touch of the Moon with the Sun (using Airless model).

Location = 28.0° North, 90.0° West, 0 Altitude.

Here is the raw input Data (from JPL Horizons)

Date__(UT)__HR:MN:SC.fff,  Azi_(app),   Elev_(app),   Ang-diam (arc seconds)

2023-Oct-14 18:51:10.500, 205.866672,    50.480288,  1924.170 = SUN (using Standard Refraction model) 

2023-Oct-14 18:51:08.500, 205.854740,    50.469536,  1924.170 = SUN (using Airless model).

2023-Oct-14 18:51:10.500, 205.176793,    50.201429,  1828.476 = MOON  (using Standard Refraction model) 

2023-Oct-14 18:51:08.500, 205.165141,    50.190523,  1828.477 = MOON  (using Airless model).

2023-Oct-14 18:51:10.5 -> ( sun_alt - moon_alt ) = 0.278859°  (using Standard Refraction model) 

2023-Oct-14 18:51:08.5 -> ( sun_alt - moon_alt ) = 0.279013°  (using Airless model).

Hope that helps - and fingers crossed that clouds keep away and you get an enjoyable eclipse viewing. 

Regards, Geoff Hitchcox, Christchurch, New Zealand - no eclipse for us this time ;-(