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There were a few other small errors in your translation (such as indenting too much stuff in two of the if statements), and I think you might have been trying to be too clever with changing SUBROUTINE into defined functions when it was a lot easier to just drop the code in-line since it was only used once. There were minor tweaks and as far as I can tell ...


You could use your image to estimate the angular size of Jupiter that night. To find the actual diameter of Jupiter you would also need to know the distance that Jupiter is from Earth, and since Jupiter and Earth are both orbiting the sun, this distance changes. You can find the distance with software (Eg Stellarium) or using Nasa's Horizons web interface ...

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