Spreadsheets 
Description 
Calculation of combined magnitude of two close stars of known
magnitude 

Calculating Rho and Theta from Gaia DR1 

Calculating Rho and Theta from Gaia DR2 

Calculating Rho and Theta from Gaia EDR3 

Calculating size of spurious disk 

Position
of Secondary in the Diffraction Pattern of the Primary.xls 
Calculating the position of the secondary in the diffraction pattern
of the primary 
Rule of Thumb (RoT) for an proposed aperture
for resolving doubles 










