<!--
{
  "availability" : [
    "iOS: 15.0.0 -",
    "iPadOS: 15.0.0 -",
    "macCatalyst: 15.0.0 -",
    "macOS: 12.0.0 -",
    "tvOS: 26.0.0 -",
    "visionOS: -"
  ],
  "documentType" : "symbol",
  "framework" : "RealityKit",
  "identifier" : "/documentation/RealityKit/OrbitAnimation/duration",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "RealityKit"
    ],
    "preciseIdentifier" : "s:17RealityFoundation14OrbitAnimationV8durationSdvp"
  },
  "title" : "duration"
}
-->

# duration

The elapsed time for one complete rotation.

```
var duration: TimeInterval { get set }
```

## Discussion

The framework sets a value for this property depending on the underlying
animation data and the specified [`speed`](/documentation/RealityKit/OrbitAnimation/speed).

You can override the default duration by defining
[`trimStart`](/documentation/RealityKit/OrbitAnimation/trimStart), [`trimEnd`](/documentation/RealityKit/OrbitAnimation/trimEnd), or
[`trimDuration`](/documentation/RealityKit/OrbitAnimation/trimDuration).

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)