sunpy.sun.true_longitude(t='now')[source] [edit on github]

Returns the Sun’s true geometric longitude (in degrees). (Referred to the mean equinox of date. Question: Should the higher accuracy terms from which app_long is derived be added to true_long?)

Parameters:t ([ int, float, time_string, datetime ], optional) – Time, which can be either time_string, int, or datetime object. Parsed using parse_time. Defaults to the current time.