HANGLE

Name

hangle

Purpose (one Line)

Compute the local hour angle of an object.

Description

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