NAME:
	hangle
 PURPOSE: (one line)
	Compute the local hour angle of an object.
 DESCRIPTION:
 CATEGORY:
	Astronomy
 CALLING SEQUENCE:
	hangle,jd,ra,dec,lat,lon,lha,lst [,UT=ut]
 INPUTS:
	JD  - Julian date (must be double precision to get nearest second).
	RA  - Right ascension (of date) in radians.
	DEC - Declination (of date) in radians.
	LAT - Latitude of observatory in radians.
	LON - West longitude of observatory in radians.
 OPTIONAL INPUT PARAMETERS:
	None.
 KEYWORD INPUT PARAMETERS:
  UT  - Time, in hours to add to JD to get the correct Universal Time.
           That the same as Universal Time minus the Local Time.
 KEYWORD OUTPUT PARAMETERS:
	ALT - Optional return of the altitude for each airmass.
  LHA - Optional return of the local hour angle.
  LST - Optional return of the local sidereal time.
 OUTPUTS:
  LHA - Return of the local hour angle.
  LST - Return of the local sidereal time.
 COMMON BLOCKS:
	None.
 SIDE EFFECTS:
 RESTRICTIONS:
	Any input may be a vector.  If more than one is a vector then the
	lengths must match.  The return will have the same dimensions as
	the input.
 PROCEDURE:
 MODIFICATION HISTORY:
	
  94/05/05 - Written by Marc W. Buie, Lowell Observatory
  2002/01/08, MWB, now allows 2-d input for jd,ra,dec