<?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>S0185-11012011000100012</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[A variant of the Titius-Bode Law]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Flores-Gutiérrez]]></surname>
<given-names><![CDATA[J. Daniel]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Guerra]]></surname>
<given-names><![CDATA[Carlos]]></given-names>
</name>
<xref ref-type="aff" rid="A02"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Astronomía ]]></institution>
<addr-line><![CDATA[México D. F.]]></addr-line>
<country>México</country>
</aff>
<aff id="A02">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Arquitectura ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2011</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2011</year>
</pub-date>
<volume>47</volume>
<numero>1</numero>
<fpage>173</fpage>
<lpage>184</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012011000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012011000100012&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012011000100012&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[En el estudio de la distribución geométrica de los planetas invariablemente se menciona la ley de Titius Bode como un intento de clasificar grosso modo sus distancias heliocétricas mediante una sucesión de números enteros. Con el descubrimiento de un gran número de objetos planetarios ahora se sustenta, en cierta medida, el principio básico de dicha ley al través de la determinación de más elementos orbitales. Abordamos brevemente una clasificación de los parámetros orbitales utilizando la constante de proporcionalidad de Kepler y discutimos el problema de la aplicación de la ley TB a sistemas extrasolares. También analizamos las funciones propuestas por diversos autores las cuales reproducen las distancias heliocéntricas de los planetas, y efectuamos una comparación con la variante a la ley Titius Bode que proponemos aquí.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[The study of the geometric distribution of the planets invariably mentions the Titius Bode law as an attempt to classify their heliocentric distances through a succession of integer numbers. With the discovery of more planetary objects better support is given to the basic principie of the law through their orbital parameters. We briefly refer to a classification of orbital parameters using Kepler's proportionality parameter and discuss the problem of applying the TB Law to extrasolar systems. We also review work by various authors who have proposed functions which reproduce with some degree of certainty the planetary heliocentric distances, and we compare them to our variant of the Titius-Bode Law.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[planets and satellites]]></kwd>
<kwd lng="en"><![CDATA[planets and satellites]]></kwd>
<kwd lng="en"><![CDATA[solar system]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b> A variant of the Titius&#150;Bode Law </b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>J. Daniel Flores&#150;Guti&eacute;rrez<sup>1</sup> and Carlos Garc&iacute;a&#150;Guerra<sup>2 </sup></b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>1 </sup>Instituto de Astronom&iacute;a, Universidad Nacional Aut&oacute;noma de M&eacute;xico, Apdo. Postal 70&#150;264, 04510 M&eacute;xico, D. F., M&eacute;xico</i> (<a href="mailto:daniel@astro.unam.mx">daniel@astro.unam.mx</a>).</font></p>     <p align="justify"><font face="verdana" size="2"><i><sup>2 </sup>Facultad de Arquitectura, Universidad Nacional Aut&oacute;noma de M&eacute;xico, M&eacute;xico</i> (<a href="mailto:carlosgg2000@hotmail.com">carlosgg2000@hotmail.com</a>).</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Received 2010 June 28    <br> Accepted 2011 February 15</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><b>RESUMEN</b></font></p>     <p align="justify"><font face="verdana" size="2">En el estudio de la distribuci&oacute;n geom&eacute;trica de los planetas invariablemente se menciona la ley de Titius Bode como un intento de clasificar <i>grosso modo </i>sus distancias helioc&eacute;tricas mediante una sucesi&oacute;n de n&uacute;meros enteros. Con el descubrimiento de un gran n&uacute;mero de objetos planetarios ahora se sustenta, en cierta medida, el principio b&aacute;sico de dicha ley al trav&eacute;s de la determinaci&oacute;n de m&aacute;s elementos orbitales. Abordamos brevemente una clasificaci&oacute;n de los par&aacute;metros orbitales utilizando la constante de proporcionalidad de Kepler y discutimos el problema de la aplicaci&oacute;n de la ley TB a sistemas extrasolares. Tambi&eacute;n analizamos las funciones propuestas por diversos autores las cuales reproducen las distancias helioc&eacute;ntricas de los planetas, y efectuamos una comparaci&oacute;n con la variante a la ley Titius Bode que proponemos aqu&iacute;.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>ABSTRACT</b></font></p>     <p align="justify"><font face="verdana" size="2">The study of the geometric distribution of the planets invariably mentions the Titius Bode law as an attempt to classify their heliocentric distances through a succession of integer numbers. With the discovery of more planetary objects better support is given to the basic principie of the law through their orbital parameters. We briefly refer to a classification of orbital parameters using Kepler's proportionality parameter and discuss the problem of applying the TB Law to extrasolar systems. We also review work by various authors who have proposed functions which reproduce with some degree of certainty the planetary heliocentric distances, and we compare them to our variant of the Titius&#150;Bode Law.</font></p>     <p align="justify"><font face="verdana" size="2"><b><i>Key Words: </i></b>planets and satellites: formation &#151; planets and satellites: general &#151; solar system: general.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/rmaa/v47n1/v47n1a12.pdf" target="_blank">DESCARGAR ART&Iacute;CULO FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>REFERENCES</b></font></p>     ]]></body>
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