The speeds of the cusps computeHouses(system, input, …) returns and of
the four angles, in degrees per day: each derivative with respect to the
RAMC, found analytically, times SIDEREAL_TIME_RATE, with the latitude
and the obliquity held fixed. Where Placidus or Koch falls back to whole
signs, the cusps are whole-sign cusps, whose speed is 0 except where the
ascendant changes sign. A speed is not defined at the instants where a cusp
jumps: whole-sign cusps at a change of sign, and every cusp that turns with
the ascendant inside the polar circle. Invalid input throws RangeError.
What a speed is here (a derivative with the latitude and the
obliquity held fixed, 0 for whole-sign cusps) differs from Swiss
Ephemeris's for several systems, and may change in a minor release.
The speeds of the cusps
computeHouses(system, input, …)returns and of the four angles, in degrees per day: each derivative with respect to the RAMC, found analytically, times SIDEREAL_TIME_RATE, with the latitude and the obliquity held fixed. Where Placidus or Koch falls back to whole signs, the cusps are whole-sign cusps, whose speed is 0 except where the ascendant changes sign. A speed is not defined at the instants where a cusp jumps: whole-sign cusps at a change of sign, and every cusp that turns with the ascendant inside the polar circle. Invalid input throws RangeError.What a speed is here (a derivative with the latitude and the obliquity held fixed, 0 for whole-sign cusps) differs from Swiss Ephemeris's for several systems, and may change in a minor release.