Function SearchPlanetLongitude

SearchPlanetLongitude(
    body: Body,
    targetLon: number,
    dateStart: FlexibleDateTime,
    limitDays: number,
    observer?: Observer,
    ayanamsaOffset?: number,
): AstroTime | null
Searches for when a planet reaches a given ecliptic longitude.
Parameters
- body: Body
- targetLon: number
- dateStart: FlexibleDateTime
- limitDays: number
- Optionalobserver: Observer
- ayanamsaOffset: number = 0
Returns AstroTime | null