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

# longitude

val [longitude](longitude.md): [Double](https://kotlinlang.org/api/latest/jvm/stdlib/kotlin/-double/index.html)

Geographic longitude in degrees east (positive) or west (negative) of the prime meridian at Greenwich, England.