From 40e5a5811c6ffce9b0974e93cdd927cbcf60c157 Mon Sep 17 00:00:00 2001 From: Joe Hunkeler Date: Tue, 11 Aug 2015 16:51:37 -0400 Subject: Repatch (from linux) of OSX IRAF --- math/slalib/doc/plante.hlp | 97 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 math/slalib/doc/plante.hlp (limited to 'math/slalib/doc/plante.hlp') diff --git a/math/slalib/doc/plante.hlp b/math/slalib/doc/plante.hlp new file mode 100644 index 00000000..a801ca51 --- /dev/null +++ b/math/slalib/doc/plante.hlp @@ -0,0 +1,97 @@ +.help plante Jun99 "Slalib Package" +.nf + + SUBROUTINE slPLTE (DATE, ELONG, PHI, JFORM, EPOCH, + : ORBINC, ANODE, PERIH, AORQ, E, + : AORL, DM, RA, DEC, R, JSTAT) + + - - - - - - - + P L T E + - - - - - - - + + Topocentric apparent RA,Dec of a Solar-System object whose + heliocentric orbital elements are known. + + Given: + DATE d MJD of observation (JD - 2400000.5) + ELONG d observer's east longitude (radians) + PHI d observer's geodetic latitude (radians) + JFORM i choice of element set (1-3; Note 4) + EPOCH d epoch of elements (TT MJD) + ORBINC d inclination (radians) + ANODE d longitude of the ascending node (radians) + PERIH d longitude or argument of perihelion (radians) + AORQ d mean distance or perihelion distance (AU) + E d eccentricity + AORL d mean anomaly or longitude (radians, JFORM=1,2 only) + DM d daily motion (radians, JFORM=1 only ) + + Returned: + RA,DEC d RA, Dec (topocentric apparent, radians) + R d distance from observer (AU) + JSTAT i status: 0 = OK + -1 = illegal JFORM + -2 = illegal E + -3 = illegal AORQ + -4 = illegal DM + -5 = numerical error + + Notes: + + 1 DATE is the instant for which the prediction is required. It is + in the TT timescale (formerly Ephemeris Time, ET) and is a + Modified Julian Date (JD-2400000.5). + + 2 The longitude and latitude allow correction for geocentric + parallax. This is usually a small effect, but can become + important for Earth-crossing asteroids. Geocentric positions + can be generated by appropriate use of routines slEVP and + slPLNE. + + 3 The elements are with respect to the J2000 ecliptic and equinox. + + 4 Three different element-format options are available: + + Option JFORM=1, suitable for the major planets: + + EPOCH = epoch of elements (TT MJD) + ORBINC = inclination i (radians) + ANODE = longitude of the ascending node, big omega (radians) + PERIH = longitude of perihelion, curly pi (radians) + AORQ = mean distance, a (AU) + E = eccentricity, e + AORL = mean longitude L (radians) + DM = daily motion (radians) + + Option JFORM=2, suitable for minor planets: + + EPOCH = epoch of elements (TT MJD) + ORBINC = inclination i (radians) + ANODE = longitude of the ascending node, big omega (radians) + PERIH = argument of perihelion, little omega (radians) + AORQ = mean distance, a (AU) + E = eccentricity, e + AORL = mean anomaly M (radians) + + Option JFORM=3, suitable for comets: + + EPOCH = epoch of perihelion (TT MJD) + ORBINC = inclination i (radians) + ANODE = longitude of the ascending node, big omega (radians) + PERIH = argument of perihelion, little omega (radians) + AORQ = perihelion distance, q (AU) + E = eccentricity, e + + 5 Unused elements (DM for JFORM=2, AORL and DM for JFORM=3) are + not accessed. + + Called: slGMST, slDT, slEPJ, slPVOB, slPRNU, + slPLNE, slDMXV, slDC2S, slDA2P + + P.T.Wallace Starlink 17 March 1999 + + Copyright (C) 1999 Rutherford Appleton Laboratory + Copyright (C) 1995 Association of Universities for Research in Astronomy Inc. + +.fi +.endhelp -- cgit