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<ri:Resource created="1998-06-08T10:19:49Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>4th Catalog of Orbits of Visual Binaries</title><shortName>V/39</shortName><identifier>ivo://CDS.VizieR/V/39</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Worley C.E.</name></creator><creator><name>Heintz W.D.</name></creator><date role="Updated">2013-02-26T12:01:38Z</date><date role="Created">1998-06-08T10:19:49Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>orbits</subject><subject>multiple-stars</subject><description>The Finsen-Worley Catalog (1970), supplemented by all subsequently published orbits known to Worley and Heintz as of 1 July 1982 formed the basis for the present compilation. Practically all stars having visual orbits were reobserved in the preceding decade, often repeatedly either with micrometers or with speckle interferometers. Astrometric solutions are included but only if they were judged to be relatively certain. Orbits with period greater than 4000 years and hyperbolic orbits were rejected as being unreliable. The catalog contains 928 orbits of 847 systems (counting triples as two systems). There are 23 orbits of unresolved systems. 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team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>RA1900</name><description>Hours RA, 1900.0</description><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DE1900</name><description>Degrees Dec, 1900.0</description><ucd>pos.eq.dec;meta.main</ucd></column><column><name>Note</name><description>[*] '*' indicates a note in file "\begin{tex}\vFile{V/39/./notes}{notes}\end{tex}"</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>ADS</name><description>Aitken's Double Star Catalog (ADS) designation</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="6*">char</dataType></column><column><name>MagA</name><description>? Magnitude of component A</description><unit>mag</unit><ucd>phot.mag</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_MagA</name><description>[V] 'V' if MagA is variable</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>MagB</name><description>? Magnitude of component B</description><unit>mag</unit><ucd>phot.mag</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_MagB</name><description>[V] 'V' if MagB is variable</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Period</name><description>Period of the binary star orbit</description><unit>a</unit><ucd>time.period</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>Axis</name><description>? Semi-major axis of the orbit</description><unit>arcsec</unit><ucd>phys.angSize.smajAxis</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Incl</name><description>[0/180] Inclination (i) of the orbit</description><unit>deg</unit><ucd>src.orbital.inclination</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Omega</name><description>[0/360[? Position of the Node</description><unit>deg</unit><ucd>pos.posAng</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>n_Omega</name><description>[*] '*' if Omega is identified as the ascending node</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>n_Grade</name><description>[A] 'A' indicates ambiguities (see intro)</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Grade</name><description>[1/5]? The grade from 1 (definitive) to 5 (indeterminate), see file intro</description><ucd>meta.ref;pos.frame</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>DateObs</name><description>? Date of last observation used in computation</description><unit>a</unit><ucd>time.epoch</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Author</name><description>Computer of the orbit</description><ucd>meta.bib.author</ucd><dataType xsi:type="vs:VOTableType" arraysize="44*">char</dataType></column><column><name>Name</name><description>Common names of the star</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="27*">char</dataType></column><column><name>SpTypeA</name><description>Spectral type of component A</description><ucd>src.spType</ucd><dataType xsi:type="vs:VOTableType" arraysize="7*">char</dataType></column><column><name>SpTypeB</name><description>Spectral type of component B (1)</description><ucd>src.spType</ucd><dataType xsi:type="vs:VOTableType" arraysize="7*">char</dataType></column><column><name>PeriT</name><description>? Time of periastron passage</description><unit>a</unit><ucd>time.epoch</ucd><dataType xsi:type="vs:VOTableType">double</dataType><flag>nullable</flag></column><column><name>Ecc</name><description>[0/1]? Eccentricity</description><ucd>src.orbital.eccentricity</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>omega</name><description>[0/360[? Longitude of Peri reckoned from Omega</description><unit>deg</unit><ucd>src.orbital.periastron</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>Eqomega</name><description>? 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