<?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>S0185-11012006000100011</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Orbit of Comet C/1853 E1 (SECCHI)]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Branham, Jr.]]></surname>
<given-names><![CDATA[R. L.]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales  ]]></institution>
<addr-line><![CDATA[Mendoza ]]></addr-line>
<country>Argentina</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2006</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2006</year>
</pub-date>
<volume>42</volume>
<numero>1</numero>
<fpage>107</fpage>
<lpage>116</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0185-11012006000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0185-11012006000100011&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0185-11012006000100011&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[El Cometa C/1853 E1 (Secchi) es uno dentro de un numeroso grupo de cometas con órbitas parabólicas. Puesto que hay suficientes observaciones del cometa, 91 en ascensión recta y el mismo número en declinación, se puede mejorar la órbita. La órbita del cometa Secchi es hiperbólica, la más hiperbólica de cualquier cometa salvo C/1980 E1 (Bowell). El cometa Secchi no está asociado de ninguna manera con el Cometa C/1664 W1.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Comet C/1853 E1 (Secchi) is one of a large number of comets with parabolic orbits. Given that there are sufficient observations of the comet, 91 in right ascension and the same number in declination, it proves possible to calculate a better orbit. Comet Secchi's orbit is hyperbolic, the most hyperbolic of any comet except C/1980 E1 (Bowell). Comet Secchi is in no way associated with Comet C/1664 W1.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[CELESTIAL MECHANICS]]></kwd>
<kwd lng="en"><![CDATA[COMETS]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[   	    <p align="center"><font face="verdana" size="4"><b>Orbit of Comet C/1853 E1 (SECCHI)</b></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>R. L. Branham, Jr.</b></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font>	</p>     <p align="justify"><font face="verdana" size="2"><i>Instituto Argentino de Nivolog&iacute;a, Glaciolog&iacute;a y Ciencias Ambientales, Argentina, C.C. 330, 5500 Mendoza, Argentina </i>(<a href="mailto:rlb@lanet.com.ar">rlb@lanet.com.ar</a>)<i>.</i></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">Received 2005 October 24    <br> 	Aaccepted 2006 February 7</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">El Cometa C/1853 E1 (Secchi) es uno dentro de un numeroso grupo de cometas con &oacute;rbitas parab&oacute;licas. Puesto que hay suficientes observaciones del cometa, 91 en ascensi&oacute;n recta y el mismo n&uacute;mero en declinaci&oacute;n, se puede mejorar la &oacute;rbita. La &oacute;rbita del cometa Secchi es hiperb&oacute;lica, la m&aacute;s hiperb&oacute;lica de cualquier cometa salvo C/1980 E1 (Bowell). El cometa Secchi no est&aacute; asociado de ninguna manera con el Cometa C/1664 W1.</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">Comet C/1853 E1 (Secchi) is one of a large number of comets with parabolic orbits. Given that there are sufficient observations of the comet, 91 in right ascension and the same number in declination, it proves possible to calculate a better orbit. Comet Secchi's orbit is hyperbolic, the most hyperbolic of any comet except C/1980 E1 (Bowell). Comet Secchi is in no way associated with Comet C/1664 W1.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Key Words:</b> CELESTIAL MECHANICS &#151; COMETS: INDIVIDUAL (C/1853 E1 SECCHI).</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/v42n1/v42n1a11.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN 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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