<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0185-1101</journal-id>
<journal-title><![CDATA[Revista mexicana de astronomía y astrofísica]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. astron. astrofis]]></abbrev-journal-title>
<issn>0185-1101</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Astronomía]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0185-11012005000100002</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Orbits of six binary stars]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Olevi&#263;]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cvetkovi&#263;]]></surname>
<given-names><![CDATA[Z.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Astronomical Observatory  ]]></institution>
<addr-line><![CDATA[Belgrado ]]></addr-line>
<country>Serbia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2005</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2005</year>
</pub-date>
<volume>41</volume>
<numero>1</numero>
<fpage>17</fpage>
<lpage>24</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012005000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012005000100002&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012005000100002&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se presentan los elementos orbitales de sistemas binarios WDS 03494-1956 = RST 2324, WDS 03513+2621 = A 1830, WDS 04093-2025 = RST 2333, WDS 06485-1226 = A 2935, WDS 07013-0906 = A 671 y WDS 18323-1439 = CHR 73. Se derivan las masas individuales y las paralajes dinámicas para todos los sistemas con excepción de WDS 18323-1439.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Preliminary orbital elements of binary systems WDS 03494-1956 = RST 2324, WDS 03513+2621 = A 1830, WDS 04093-2025 = RST 2333, WDS 06485-1226 = A 2935, WDS 07013-0906 = A 671, and WDS 18323-1439 = CHR 73 are presented. For all systems but WDS 18323-1439 the individual masses and dynamical parallaxes are derived.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Binaries]]></kwd>
<kwd lng="en"><![CDATA[Stars]]></kwd>
<kwd lng="en"><![CDATA[Stars]]></kwd>
<kwd lng="en"><![CDATA[Stars]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b>Orbits of six binary stars</b></font></p>     <p align="center">&nbsp;</p>  		    <p align="center"><font face="verdana" size="2"><b>D. Olevi&#263; and Z. Cvetkovi&#263;</b></font></p>     <p align="justify">&nbsp;</p>      	    <p align="justify"><font face="verdana" size="2"><i>Astronomical Observatory, Volgina 7, 11160&#45;Belgrade 74, Serbia and Montenegro</i> (<a href="mailto:dolevic@aob.bg.ac.yu">dolevic@aob.bg.ac.yu</a>, <a href="mailto:zcvetkovic@aob.bg.ac.yu">zcvetkovic@aob.bg.ac.yu</a>).</font></p>     <p align="justify">&nbsp;</p> 	    <p align="justify"><font face="verdana" size="2">Received, 2004 April 2    <br> Accepted 2004 October 15. </font></p> 	    <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>RESUMEN</b></font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Se presentan los elementos orbitales de sistemas binarios WDS 03494&#45;1956 = RST 2324, WDS 03513+2621 = A 1830, WDS 04093&#45;2025 = RST 2333, WDS 06485&#45;1226 = A 2935, WDS 07013&#45;0906 = A 671 y WDS 18323&#45;1439 = CHR 73. Se derivan las masas individuales y las paralajes din&aacute;micas para todos los sistemas con excepci&oacute;n de WDS 18323&#45;1439.</font></p>     <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><b>ABSTRACT</b></font></p>     <p align="justify"><font face="verdana" size="2">Preliminary orbital elements of binary systems WDS 03494&#45;1956 = RST 2324, WDS 03513+2621 = A 1830, WDS 04093&#45;2025 = RST 2333, WDS 06485&#45;1226 = A 2935, WDS 07013&#45;0906 = A 671, and WDS 18323&#45;1439 = CHR 73 are presented. For all systems but WDS 18323&#45;1439 the individual masses and dynamical parallaxes are derived.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Key Words:</b> Binaries: Visual &#151; Stars: Distances &#151; Stars: Fundamental parameters &#151; Stars: Masses.</font></p>     <p align="justify">&nbsp;</p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmaa/v41n1/v41n1a2.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify">&nbsp;</p>            <p align="justify"><font face="verdana" size="2"><b>ACKNOWLEDGMENTS</b></font></p>     <p align="justify"><font face="verdana" size="2">The authors thank Dr. Hartkopf for his courtesy in completing the observational data. Gratitude is also owed to the anonymous referee for very useful suggestions which contributed significantly to the improvement of the paper.</font></p>  	  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">This research has been supported by the Serbian Ministry of Science and Environmental Protection (Project No. 1221, "Investigation of Double and Multiple Stars").</font></p>     <p align="justify">&nbsp;</p>  	    <p align="justify"><font face="verdana" size="2"><b>REFERENCES</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">Angelov, T. 1993, Bull. Obs. Astron. Belgrade, 148, 1</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414546&pid=S0185-1101200500010000200001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">ESA 1997, The Hipparcos and Tycho Catalogues, ESA SP&#45;1200</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414547&pid=S0185-1101200500010000200002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">Hartkopf, W. I., &amp; Mason, B. D. 2003, Sixth Catalog of Orbits of Visual Binary Stars (Washington: US Naval Observatory). Electronic version <a href="http://ad.usno.navy.mil/wds/orb6.html" target="_blank">http://ad.usno.navy.mil/wds/orb6.html</a></font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414548&pid=S0185-1101200500010000200003&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">Lang, K.R . 1991, Astrophysical Data: Planets and Stars (Springer&#45;Verlag)</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414549&pid=S0185-1101200500010000200004&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2"> Mason, B. D., Douglas, G. G., &amp; Hartkopf, W. I. 1999, AJ, 117, 1023</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414550&pid=S0185-1101200500010000200005&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">Mason, B. D., Wycoff, G. L., &amp; Hartkopf, W. I. 2003, The Washington Visual Double Star Catalogue (Washington: US Naval Observatory). Electronic version <a href="http://ad.usno.navy.mil/wds/wds.html" target="_blank">http://ad.usno.navy.mil/wds/wds.html</a></font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414551&pid=S0185-1101200500010000200006&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">Olevi&#263;, D. 2002, IAUDS Inf. Cir. 148</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414552&pid=S0185-1101200500010000200007&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">Olevi&#263;, D., &amp; Cvetkovi&#263;, Z. 2004, A&amp;A, 415, 259</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414553&pid=S0185-1101200500010000200008&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --><!-- ref --><p align="justify"><font face="verdana" size="2">S&ouml;derhjelm, S. 1999, A&amp;A, 341, 121</font>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=7414554&pid=S0185-1101200500010000200009&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --> ]]></body><back>
<ref-list>
<ref id="B1">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Angelov]]></surname>
<given-names><![CDATA[T.]]></given-names>
</name>
</person-group>
<source><![CDATA[Bull. Obs. Astron. Belgrade]]></source>
<year>1993</year>
<numero>148</numero>
<issue>148</issue>
<page-range>1</page-range></nlm-citation>
</ref>
<ref id="B2">
<nlm-citation citation-type="book">
<collab>ESA</collab>
<source><![CDATA[The Hipparcos and Tycho Catalogues]]></source>
<year>1997</year>
<page-range>1200</page-range><publisher-name><![CDATA[ESA SP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Hartkopf]]></surname>
<given-names><![CDATA[W. I.]]></given-names>
</name>
<name>
<surname><![CDATA[Mason]]></surname>
<given-names><![CDATA[B. D.]]></given-names>
</name>
</person-group>
<source><![CDATA[Sixth Catalog of Orbits of Visual Binary Stars]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[US Naval Observatory]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Lang]]></surname>
<given-names><![CDATA[K.R]]></given-names>
</name>
</person-group>
<source><![CDATA[Astrophysical Data: Planets and Stars]]></source>
<year>1991</year>
<publisher-name><![CDATA[Springer-Verlag]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mason]]></surname>
<given-names><![CDATA[B. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Douglas]]></surname>
<given-names><![CDATA[G. G.]]></given-names>
</name>
<name>
<surname><![CDATA[Hartkopf]]></surname>
<given-names><![CDATA[W. I.]]></given-names>
</name>
</person-group>
<source><![CDATA[AJ,]]></source>
<year>1999</year>
<volume>117</volume>
<page-range>1023</page-range></nlm-citation>
</ref>
<ref id="B6">
<nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Mason]]></surname>
<given-names><![CDATA[B. D.]]></given-names>
</name>
<name>
<surname><![CDATA[Wycoff]]></surname>
<given-names><![CDATA[G. L.]]></given-names>
</name>
<name>
<surname><![CDATA[Hartkopf]]></surname>
<given-names><![CDATA[W. I.]]></given-names>
</name>
</person-group>
<source><![CDATA[The Washington Visual Double Star Catalogue]]></source>
<year>2003</year>
<publisher-loc><![CDATA[Washington ]]></publisher-loc>
<publisher-name><![CDATA[US Naval Observatory]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Olevi&#263;]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
</person-group>
<source><![CDATA[IAUDS Inf. Cir.]]></source>
<year>2002</year>
<volume>148</volume>
</nlm-citation>
</ref>
<ref id="B8">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Olevi&#263;]]></surname>
<given-names><![CDATA[D.]]></given-names>
</name>
<name>
<surname><![CDATA[Cvetkovi&#263;]]></surname>
<given-names><![CDATA[Z]]></given-names>
</name>
</person-group>
<source><![CDATA[A & A]]></source>
<year>2004</year>
<volume>415</volume>
<page-range>259</page-range></nlm-citation>
</ref>
<ref id="B9">
<nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Söderhjelm]]></surname>
<given-names><![CDATA[S.]]></given-names>
</name>
</person-group>
<source><![CDATA[A & A]]></source>
<year>1999</year>
<volume>341</volume>
<page-range>121</page-range></nlm-citation>
</ref>
</ref-list>
</back>
</article>
