From d54fe7c1f704a63824c5bfa0ece65245572e9b27 Mon Sep 17 00:00:00 2001 From: Joseph Hunkeler Date: Wed, 4 Mar 2015 21:21:30 -0500 Subject: Initial commit --- src/slalib/sun67.htx/node97.html | 98 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 98 insertions(+) create mode 100644 src/slalib/sun67.htx/node97.html (limited to 'src/slalib/sun67.htx/node97.html') diff --git a/src/slalib/sun67.htx/node97.html b/src/slalib/sun67.htx/node97.html new file mode 100644 index 0000000..a386ad5 --- /dev/null +++ b/src/slalib/sun67.htx/node97.html @@ -0,0 +1,98 @@ + + + + +SLA_EQECL - J2000 to Ecliptic + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_EQEQX - Equation of the Equinoxes +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_EPJ2D - Julian Epoch to MJD +

+

+

    +
+SLA_EQECL - J2000 $\alpha,\delta$ to Ecliptic +

+
+
ACTION: +
Transformation from J2000.0 equatorial coordinates to +ecliptic longitude and latitude. +

CALL: +
CALL sla_EQECL (DR, DD, DATE, DL, DB) +

+

+
GIVEN: +
+
+ + + + + + + + + +
DR,DDDJ2000.0 mean $[\,\alpha,\delta\,]$ (radians)
DATEDTDB (formerly ET) as Modified Julian Date (JD-2400000.5)
+

+
RETURNED: +
+
+ + + + + +
DL,DBDecliptic longitude and latitude +(mean of date, IAU 1980 theory, radians)
+
+ +next + +up + +previous +
+ Next: SLA_EQEQX - Equation of the Equinoxes +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_EPJ2D - Julian Epoch to MJD +

+

+

+SLALIB --- Positional Astronomy Library
Starlink User Note 67
P. T. Wallace
12 October 1999
E-mail:ptw@star.rl.ac.uk +
+ + -- cgit