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4 votes

Wrong results of calculating moon's altitude and azimuth

You need to normalize the sidereal time $theta0$ into the range 0...360 because the second term is hundreds or thousands of days ahead of or behind 2000 Jan 1.5 (JD 2451545.0) multiplied by 360.98.. ...
astrosnapper's user avatar
  • 8,412
3 votes

Modern equivalent of Astronomical Algorithms by Jean Meeus?

The methods described in Jean Meeus's book are still valid, and accurate enough for the needs of most amateur and many professional astronomers. The science of positional astronomy doesn't change so ...
DavidHarper's user avatar

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