SET OBSERVATORY

        LAS\SET OBSERVATORY *
        LAS\SET OBSERVATORY Name Longitude Latitude Altitude

    If OBSERVATORY is *, Class will guess the observatory from the TELESCOPE
    name. This is the default.

    If an observatory name is provided with its  longitude,  latitude  (both
    sexagesimal  strings) and altitude (in kilometers), Class will use those
    values independently of the TELESCOPE name. This is useful in particular
    for observatories unknown by Class.