//[astronomy](../../../index.md)/[io.github.cosinekitty.astronomy](../index.md)/[StateVector](index.md)

# StateVector

data class [StateVector](index.md)(x: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), y: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), z: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), vx: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), vy: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), vz: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), t: [Time](../-time/index.md))

Represents a combined position vector and velocity vector at a given moment in time.

## Constructors

| | |
|---|---|
| [StateVector](-state-vector.md)<br>fun [StateVector](-state-vector.md)(pos: [Vector](../-vector/index.md), vel: [Vector](../-vector/index.md), time: [Time](../-time/index.md))<br>Combines a position vector and a velocity vector into a single state vector. |
| [StateVector](-state-vector.md)<br>fun [StateVector](-state-vector.md)(x: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), y: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), z: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), vx: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), vy: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), vz: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html), t: [Time](../-time/index.md)) |

## Functions

| Name | Summary |
|---|---|
| [div](div.md)<br>operator fun [div](div.md)(denom: [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html)): [StateVector](index.md)<br>Divides a state vector by a scalar. |
| [minus](minus.md)<br>operator fun [minus](minus.md)(other: [StateVector](index.md)): [StateVector](index.md)<br>Subtracts two state vetors, yielding the state vector difference. |
| [plus](plus.md)<br>operator fun [plus](plus.md)(other: [StateVector](index.md)): [StateVector](index.md)<br>Adds two state vetors, yielding the state vector sum. |
| [position](position.md)<br>fun [position](position.md)(): [Vector](../-vector/index.md)<br>Returns the position vector associated with this state vector. |
| [unaryMinus](unary-minus.md)<br>operator fun [unaryMinus](unary-minus.md)(): [StateVector](index.md)<br>Negates a state vector; the same as multiplying the state vector by the scalar -1. |
| [velocity](velocity.md)<br>fun [velocity](velocity.md)(): [Vector](../-vector/index.md)<br>Returns the velocity vector associated with this state vector. |

## Properties

| Name | Summary |
|---|---|
| [t](t.md)<br>val [t](t.md): [Time](../-time/index.md)<br>The date and time at which this vector is valid. |
| [vx](vx.md)<br>val [vx](vx.md): [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html)<br>A Cartesian velocity x-component expressed in AU/day. |
| [vy](vy.md)<br>val [vy](vy.md): [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html)<br>A Cartesian velocity y-component expressed in AU/day. |
| [vz](vz.md)<br>val [vz](vz.md): [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html)<br>A Cartesian velocity z-component expressed in AU/day. |
| [x](x.md)<br>val [x](x.md): [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html)<br>A Cartesian position x-coordinate expressed in AU. |
| [y](y.md)<br>val [y](y.md): [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html)<br>A Cartesian position y-coordinate expressed in AU. |
| [z](z.md)<br>val [z](z.md): [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html)<br>A Cartesian position z-coordinate expressed in AU. |