I fear that you can calculate till the cows come home and only (possibly) come up with sunrise times for reality. But the game will stubbornly refuse to cooperate because it is not a solar system simulator, ESPECIALLY where the moon is concerned., I have an SH4 screenshot with a crescent moon less than 10 degrees from a setting (or rising) sun. The phase of the moon is directly related to its rise and set times. Since the screenshot is impossible, the moonrise tme must not be just a little bit, but radically wrong.
And all those calculations just go to waste. SH4 did a TERRIBLE job with solar system astronomy. And just a bad job with deep space astronomy.
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