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/node149.html | 135 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 135 insertions(+) create mode 100644 src/slalib/sun67.htx/node149.html (limited to 'src/slalib/sun67.htx/node149.html') diff --git a/src/slalib/sun67.htx/node149.html b/src/slalib/sun67.htx/node149.html new file mode 100644 index 0000000..999078a --- /dev/null +++ b/src/slalib/sun67.htx/node149.html @@ -0,0 +1,135 @@ + + + + +SLA_PM - Proper Motion + + + + + + + + + + + + +
+ +next + +up + +previous +
+ Next: SLA_POLMO - Polar Motion +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_PLANTE - of Planet from Elements +

+

+

SLA_PM - Proper Motion +   +

+
+
ACTION: +
Apply corrections for proper motion to a star $[\,\alpha,\delta\,]$.
CALL: +
CALL sla_PM (R0, D0, PR, PD, PX, RV, EP0, EP1, R1, D1) +

+

+
GIVEN: +
+
+ + + + + + + + + + + + + + + + + + + + + + + + + +
R0,D0D$[\,\alpha,\delta\,]$ at epoch EP0 (radians)
PR,PDDproper motions: rate of change of +$[\,\alpha,\delta\,]$ (radians per year)
PXDparallax (arcsec)
RVDradial velocity (km s-1, +ve if receding)
EP0Dstart epoch in years (e.g. Julian epoch)
EP1Dend epoch in years (same system as EP0)
+

+
RETURNED: +
+
+ + + + + +
R1,D1D$[\,\alpha,\delta\,]$ at epoch EP1 (radians)
+

+
NOTE: +
The $\alpha$ proper motions are $\dot{\alpha}$ rather than +$\dot{\alpha}\cos\delta$, and are in the same coordinate + system as R0,D0. +
+

+
REFERENCES: +
+
1. +
1984 Astronomical Almanac, pp B39-B41. +
2. +
Lederle & Schwan, 1984. Astr. Astrophys. 134, 1-6. +
+
+ +next + +up + +previous +
+ Next: SLA_POLMO - Polar Motion +
+Up: SUBPROGRAM SPECIFICATIONS +
+ Previous: SLA_PLANTE - of Planet from Elements +

+

+

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