//[astronomy](../../index.md)/[io.github.cosinekitty.astronomy](index.md)/[rotationEqdEct](rotation-eqd-ect.md)

# rotationEqdEct

fun [rotationEqdEct](rotation-eqd-ect.md)(time: [Time](-time/index.md)): [RotationMatrix](-rotation-matrix/index.md)

Calculates a rotation matrix from equator of date (EQD) to true ecliptic of date (ECT).

This is one of the family of functions that returns a rotation matrix for converting from one orientation to another. Source: EQD = equator of date Target: ECT = true ecliptic of date

#### Return

A rotation matrix that converts EQD to ECT.

## Parameters

| | |
|---|---|
| time | The date and time of the equator/ecliptic conversion. |