calc_astrol_longitudes.py Computes the basic astronomical mean longitudes: s, h, p, N and PP Note N is not N', i.e. N is decreasing with time. Formulae for the period 1990-2010 were derived by David Cartwright Calling Sequence from pyTMD.calc_astrol_longitudes import calc_astrol_longitudes s,h,p,N,PP = calc_astrol_longitudes(time, ASTRO5=True) Inputs time: modified Julian day of input date Options MEEUS: use additional coefficients from Meeus Astronomical Algorithms ASTRO5: use Meeus Astronomical coefficients as implemented in ASTRO5 Outputs s: mean longitude of moon (degrees) h: mean longitude of sun (degrees) p: mean longitude of lunar perigee (degrees) N: mean longitude of ascending lunar node (degrees) PP: longitude of solar perigee (degrees)