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Dear Dave,

Thank you for your kind reply.

(1) - Meanwhile I carefully reviewed my sequences of all previous computations and I would still trust them as reliable. (Paul, would you be so kind as to confirm this if you have the time to do so ?).

(2) - Nonetheless this earlier post of yours, Dave, let me find an error in my initial Izmir results most probably caused by some data loading typo.

Corrected results as regards the Izmir University Observatory (N38°23'/E027°16'/UT=02h35m30s) are:

Sun at -9.2° below the Horizon (vs. -9.1° below the Horizon)  and :

S 7.083/99.3 (vs. 7.178/99.4)     M 7.934/98.6 (vs. 8.028/98.6)    V 10.676/97.4 (vs.10.772/97.5)

yielding :  SV 332.1° (vs. 332.1°) , SM 320.6° (vs. 316.7°) and V-M +11.6° (vs. +15.4°)

These corrected SV / SM / V-M results are more in line with the previously published partial derivatives computed for the Cairo position.

Still a visible mismatch between the data corrected herabove ( i.e. SV 332.1° / SM 320.6° / V-M +11.6° ) and

the photo data ( SV 327° / SM 321° / V-M +6° ) .

(3) - Again, for anybody having access to Stellarium or equivalent Software, do not hesitate to jump into this conversation and publish the 25APR2025 sky views covering Venus/Moon and Saturn from Izmir (N38°23'/E027°16'/UT=02h35m30s) and Cairo (N34°/E30°/UT02h15m) in order to compare these computed generated pictures to the real world initial "Position from a Moon-Venus photo".

(4) - We are then expecting other contributions, especially from you Frank as earlier submitted in the conclusion of my previous post.

Antoine M. "Kermit" Couëtte

antoine.m.couette@club-internet.fr