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### About the number of limit seconds of composite

2001/05/10 T.Ikemura

About the number of limit seconds of composite in planet photography
with the optical resolution limits of the telescope.
I made calculation types such as the following.
The number of limit seconds.(It is stricter than the theory value.)
D=Telescope Diameters (cm)
dia=The diameters of the appearance of the planet(")
h = The hour number of times which the planet One rotating of necessity
Limit seconds = h * 8000 / dia" / D(cm)
Example
Jupiter 10 hours , 45" , 31cm
limit seconds =10 * 8000 / 45 / 31 = 57(sec)
Mars 24.6 hours , 15" , 31cm
limit seconds =24.6 * 8000 / 15 / 31 = 423(sec) .. 7minutes

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