Assembly: ASCOM.Astrometry (in ASCOM.Astrometry.dll) Version: 188.8.131.52 (184.108.40.20619)
The high-level NOVAS astrometric functions are implemented as methods of Star: GetTopocentricPosition(), GetLocalPosition(), GetApparentPosition(), GetVirtualPosition(), and GetAstrometricPosition(). These methods operate on the properties of the Star, and produce a PositionVector object. For example, to get the topocentric coordinates of a star, simply create and initialize a Star, then call Star.GetTopocentricPosition(). The resulting vaPositionVector's right ascension and declination properties are the topocentric equatorial coordinates, at the same time, the (optionally refracted) alt-az coordinates are calculated, and are also contained within the returned PositionVector. Note that Alt/Az is available in PositionVectors returned from calling GetTopocentricPosition().