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<ri:Resource created="1997-12-09T15:40:26Z" 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>Perth 75 Catalogue</title><shortName>I/97</shortName><identifier>ivo://CDS.VizieR/I/97</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Nikoloff I.</name></creator><creator><name>Hog E.</name></creator><date role="Updated">2013-02-08T15:24:12Z</date><date role="Created">1997-12-09T15:40:26Z</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>astrometry</subject><subject>proper-motions</subject><subject>optical-observation</subject><subject>meridian-circles</subject><description>The catalog contains results of approximately 60000 photoelectric meridian circle observations made at the Perth Observatory for 1156 FK4 and 1433 FK4 Supplement stars south of declination +38 degrees. The catalog reports proper motions and positions at epoch and equinox B1950.0. The data used to derive the epoch 1950 positions are included in the catalog so that originally observed positions may be recomputed and used for geodetic purposes until the FK5 becomes available. The mean error of an individual position in this catalog is 0.07" in right ascension and 0.13" in declination at a zenith distance of 45 degrees, while the mean error of the PERTH 75 system is 0.05" in right ascension and 0.10" in declination. The positions do not contain the large systematic errors of the FK4 (Fricke and Kopff 1963), which can be, for example 0.3" in right ascension for declination &lt; -75 degrees. Data in the catalog included FK4 (FK4S) number, observed visual magnitude, spectral type used for computing refraction, right ascension and declination (equinox and epoch B1950.0), annual proper motion, observed residuals, numbers of accepted observations, and code to indicate if parallax and/or radial velocity has been used in computing apparent positions.</description><source>Bickley W. Australia, Perth Observatory (1982)</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/I/97</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/I/62">I/62 : The Perth 70 Catalogue of Positions of 24900 Stars (Hog+ 1976)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/143">I/143 : FK4 Catalogue (Fricke &amp; Kopff, 1963)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/149">I/149 : FK5 Catalogue, part I : Basic Fundamental Stars (Fricke et al. 1988)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/I/175">I/175 : FK5 Catalogue, 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45443 45450 45469 45485 45489 45495 45522 45530 45549 45564 45567 45576 45579 45587 45589 45605 45613 45616 45623 45643 45654 45669 45672 45689 45699 45720 45725 45729 45746 45784 45790 45807 45819 45828 45851 45858 45874 45893 45918 45922 45925 45930 45932 45964 45983 45988 46022 46036 46061 46065 46081 46083 46091 46096 46110 46113 46123 46131 46149 46155 46187 46193 46214 46236 46246 46261 46262 46273 46281 46294 46318 46321 46334 46337 46343 46355 46367 46368 46380 46389 46409 46423 46436 46459 46469 46502 46507 46515 46528 46532 46550 46570 46572 46582 46595 46615 46640 46681 46697 46707 46725 46740 46748 46763 46768 46775 46793 46802 46830 46835 46845 46851 46893 46901 46908 46939 46974 46982 46987 47028 47033 47052 47056 47090 47098 47101 47112 47121 47126 47140 47157 47165 47197 47205 47232 47237 47246 47263 47282 47298 47301 47318 47334 47349 47361 47377 47385 47396 47418 47422 47424 47433 47440 47465 47477 47514 47539 47574 47577 47584 47593 47622 47644 47648 47672 47688 47703 47714 47717 47740 47745 47760 47763 47775 47788 47809 47825 47845 47855 47873 47889 47914 47916 47921 47947 47952 47967 47986 48021 48025 48040 48051 48088 48104 48121 48134 48143 48148 48188 48203 48220 48232 48250 48262 48269 48298 48302 48330 48344 48355 48390 48414 48425 48481 48504 48516 48525 48534 48546 48572 48587 48589 48606 48636 48657 48687 48694 48709 48714 48735 48747 48753 48784 48804 48814 48856 48872 48886 48900 48910 48943 48963 48980 48992 49008 49026 49047 49049 49060 49065 49109 49114 49123 49149</spatial><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/I/97?format=ascii</footprint><waveband>Optical</waveband></coverage><tableset><schema><name>default</name><table><name>I/97/perth75</name><description>The catalogue Perth 75</description><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>FK4</name><description>Star number in FK4 (&lt; 2000) or FK4S (&gt; 2000).</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Vmag</name><description>Observed or FK4 visual magnitude (see n_Vmag)</description><unit>mag</unit><ucd>phot.mag;em.opt.V</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>n_Vmag</name><description>[s] An "s" (lower case) if Vmag has been taken from the FK4.</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>Sp</name><description>The HD spectral type</description><ucd>src.spType</ucd><dataType xsi:type="vs:VOTableType" arraysize="2*">char</dataType></column><column><name>RAB1950</name><description>Right Ascension B1950</description><ucd>pos.eq.ra;meta.main</ucd></column><column><name>DEB1950</name><description>Declination B1950</description><ucd>pos.eq.dec;meta.main</ucd></column><column><name>pmRA</name><description>Annual proper motion in R.A.</description><unit>s/yr</unit><ucd>pos.pm;pos.eq.ra</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>pmDE</name><description>Annual proper motion in Dec.</description><unit>arcsec/yr</unit><ucd>pos.pm;pos.eq.dec</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>O-C(RA)</name><description>Observed residual in apparent RA cos(Dec), in the sense Observed minus FK4 or FK4S.</description><unit>10mas</unit><ucd>pos.eq.ra;arith.diff</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>O-C(DE)</name><description>Observed residual in apparent in Dec., in the sense Observed minus FK4 or FK4S.</description><unit>10mas</unit><ucd>pos.eq.dec;arith.diff</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>o_RAB1950</name><description>Number of accepted observations in R.A.</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>o_DEB1950</name><description>Number of accepted observations in Dec.</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>EpRA-1900</name><description>Epoch - 1900 for the observation in R.A.</description><unit>yr</unit><ucd>time.epoch</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>pFlag</name><description>[p] A letter "p" (lower case) if parallax and/or radial velocity used in computing apparent positions.</description><ucd>meta.note</ucd><dataType xsi:type="vs:VOTableType" arraysize="1*">char</dataType></column><column><name>_RA.icrs</name><description>Right ascension (ICRS) at Epoch=J2000, proper motions taken into account (computed by VizieR, not part of the original data)</description><ucd>pos.eq.ra</ucd><flag>nullable</flag><flag>indexed</flag></column><column><name>_DE.icrs</name><description>Declination (ICRS) at Epoch=J2000, proper motions taken into account (computed by VizieR, not part of the original data)</description><ucd>pos.eq.dec</ucd><flag>nullable</flag><flag>indexed</flag></column></table></schema></tableset></ri:Resource>