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<TITLE>SLA_DJCL - MJD to Year,Month,Day,Frac</TITLE>
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<H2><A NAME="SECTION000446000000000000000">SLA_DJCL - MJD to Year,Month,Day,Frac</A>
<A NAME="xref_SLA_DJCL"> </A><A NAME="SLA_DJCL"> </A>
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<DL>
<DT><STRONG>ACTION:</STRONG>
<DD>Modified Julian Date to Gregorian year, month, day,
and fraction of a day.
<P> <DT><STRONG>CALL:</STRONG>
<DD><TT>CALL sla_DJCL (DJM, IY, IM, ID, FD, J)</TT>
<P> </DL>
<P> <DL>
<DT><STRONG>GIVEN:</STRONG>
<DD>
<BR>
<TABLE CELLPADDING=3>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>DJM</EM></TD>
<TH ALIGN="LEFT"><B>D</B></TH>
<TD ALIGN="LEFT" NOWRAP>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>IY</EM></TD>
<TH ALIGN="LEFT"><B>I</B></TH>
<TD ALIGN="LEFT" NOWRAP>year</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>IM</EM></TD>
<TD ALIGN="LEFT"><B>I</B></TD>
<TD ALIGN="LEFT" NOWRAP>month</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>ID</EM></TD>
<TD ALIGN="LEFT"><B>I</B></TD>
<TD ALIGN="LEFT" NOWRAP>day</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>FD</EM></TD>
<TD ALIGN="LEFT"><B>D</B></TD>
<TD ALIGN="LEFT" NOWRAP>fraction of day</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM>J</EM></TD>
<TD ALIGN="LEFT"><B>I</B></TD>
<TD ALIGN="LEFT" NOWRAP>status:</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM></EM></TD>
<TD ALIGN="LEFT"><B></B></TD>
<TD ALIGN="LEFT" NOWRAP> 0 = OK</TD>
</TR>
<TR VALIGN="TOP"><TD ALIGN="LEFT"><EM></EM></TD>
<TD ALIGN="LEFT"><B></B></TD>
<TD ALIGN="LEFT" NOWRAP> -1 = unacceptable date (before 4701BC March 1)</TD>
</TR>
</TABLE></DL>
<P> <DL>
<DT><STRONG>REFERENCE:</STRONG>
<DD>The algorithm is derived from that of Hatcher,
<I>Q.Jl.R.astr.Soc.</I> (1984) <B>25</B>, 53-55.
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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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