ReadonlyepochWhen value holds: { julianDateTT }, a TT Julian date within the Date
range, or a UTC instant as a Date or an ISO 8601 string, read on the
engine's time basis. A bare number is refused: it could be a Julian date
or epoch milliseconds.
Optional ReadonlymodelWithout rate: the model value was computed with, default "engine"
(value then holds at epoch); an older model's zodiac is held at
J2000.0, as for the built-ins.
Optional ReadonlynameLowercase identifier, at most 64 characters, not a built-in name; default "user".
Optional ReadonlyrateArcseconds per Julian year, in [−3600, 3600]: a linear ayanamsa.
ReadonlyvalueThe mean ayanamsa at epoch as model computes it, degrees, in [−360, 360].
Input to userAyanamsa.