astronomy/source/kotlin/doc/rotation-ect-eqj.md

//astronomy/io.github.cosinekitty.astronomy/rotationEctEqj

rotationEctEqj

fun rotationEctEqj(time: Time): RotationMatrix

Calculates a rotation matrix from true ecliptic of date (ECT) to J2000 mean equator (EQJ).

This is one of the family of functions that returns a rotation matrix for converting from one orientation to another. Source: ECT = ecliptic system, using true equinox of the specified date/time. Target: EQJ = equatorial system, using equator at J2000 epoch.

Parameters

time	The date and time at which the Earth's equator defines the target orientation.