"tropical" (default), or { sidereal } with a built-in ayanamsa's name or a
caller's ayanamsa. A sidereal longitude is the longitude in the ecliptic of
date less the ayanamsa: the true ayanamsa (the mean plus the nutation in
longitude) in the true ecliptic of date, the mean ayanamsa in the mean one.
"tropical" (default), or
{ sidereal }with a built-in ayanamsa's name or a caller's ayanamsa. A sidereal longitude is the longitude in the ecliptic of date less the ayanamsa: the true ayanamsa (the mean plus the nutation in longitude) in the true ecliptic of date, the mean ayanamsa in the mean one.