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+<H2><A NAME="SECTION0004121000000000000000">SLA_NUTC - Nutation Components</A>
+<A NAME="xref_SLA_NUTC">&#160;</A><A NAME="SLA_NUTC">&#160;</A>
+</H2>
+ <DL>
+<DT><STRONG>ACTION:</STRONG>
+<DD>Nutation (IAU 1980 theory): longitude &amp; obliquity
+components, and mean obliquity.
+<P> <DT><STRONG>CALL:</STRONG>
+<DD><TT>CALL sla_NUTC (DATE, DPSI, DEPS, EPS0)</TT>
+<P> </DL>
+<P> <DL>
+<DT><STRONG>GIVEN:</STRONG>
+<DD>
+<BR>
+<TABLE CELLPADDING=3>
+<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>DATE</EM></TD>
+<TH ALIGN="LEFT"><B>D</B></TH>
+<TD ALIGN="LEFT" NOWRAP>TDB (formerly ET) as Modified Julian Date
+(JD-2400000.5)</TD>
+</TR>
+</TABLE></DL>
+<P> <DL>
+<DT><STRONG>RETURNED:</STRONG>
+<DD>
+<BR>
+<TABLE CELLPADDING=3>
+<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>DPSI,DEPS</EM></TD>
+<TH ALIGN="LEFT"><B>D</B></TH>
+<TD ALIGN="LEFT" NOWRAP>nutation in longitude and obliquity (radians)</TD>
+</TR>
+<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>EPS0</EM></TD>
+<TD ALIGN="LEFT"><B>D</B></TD>
+<TD ALIGN="LEFT" NOWRAP>mean obliquity (radians)</TD>
+</TR>
+</TABLE></DL>
+<P> <DL>
+<DT><STRONG>REFERENCES:</STRONG>
+<DD><DL COMPACT>
+<DT>1.
+<DD>Final report of the IAU Working Group on Nutation,
+chairman P.K.Seidelmann, 1980.
+<DT>2.
+<DD>Kaplan, G.H., 1981. <I>USNO circular no. 163</I>, pA3-6.
+ </DL></DL>
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+<ADDRESS>
+<I>SLALIB --- Positional Astronomy Library<BR>Starlink User Note 67<BR>P. T. Wallace<BR>12 October 1999<BR>E-mail:ptw@star.rl.ac.uk</I>
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