SUNJS2 Name
SUNJS2 Purpose
Computes geocentric physical ephemeris of the sun.
Category
Calling Sequence
sunjs2, js Inputs
js = ephemeris time as Julian Seconds. in
Delta T = ET - UT which is not completely
predictable but is about 1 minute now.
This difference is noticable slightly.
Keyword Parameters
Keywords
/LIST displays values on screen.
DIST = distance in AU.
SD = semidiameter of disk in arc seconds.
TRUE_LONG = true longitude (deg).
TRUE_LAT = 0 always.
APP_LONG = apparent longitude (deg).
APP_LAT = 0 always.
J2000_LONG = J2000.0 longitude (deg).
J2000_LAT = 0 always.
TRUE_RA = true RA (hours).
TRUE_DEC = true Dec (deg).
APP_RA = apparent RA (hours).
APP_DEC = apparent Dec (deg).
LAT0 = latitude at center of disk (deg).
LONG0 = longitude at center of disk (deg).
PA = position angle of rotation axis (deg).
CARRINGTON = Carrington rotation number.
Outputs
Common Blocks
Notes
Notes: based on the book Astronomical Algorithms
Chapter 24, by Jean Meeus. Good to about 0.01 degree.
Coefficients based on above reference.
If no arguments given will prompt and list values.
Modification History
R. Sterner, 2004 Feb 05
Copyright (C) 2004, Johns Hopkins University/Applied Physics Laboratory
This software may be used, copied, or redistributed as long as it is not
sold and this copyright notice is reproduced on each copy made. This
routine is provided as is without any express or implied warranties
whatsoever. Other limitations apply as described in the file disclaimer.txt.