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:
 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