J/BaltA/14/179ivo://CDS.VizieR/J/BaltA/14/179doi:10.26093/cds/vizier/bm-e-5kCDSZdanavicius J.Straizys V.Chen C.W.Chen W.P.Zdanavicius K.,Kazlauskas A.Cernis K.Davis P.A.G.Boyle R.P.Tautvaisiene G.2026-03-17T20:06:29Z2009-10-02T12:59:36ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fropen-star-clustersccd-photometryvilnius-photometryThe area of the open cluster NGC 1647 in Taurus is investigated by CCD photometry in the Vilnius seven-color system. Magnitudes and color indices are determined for 433 stars down to V=15.0mag in the 45arcmin diameter area. For 252 of them photometric spectral and luminosity classes, interstellar reddenings, extinctions and distances are obtained. According to the CDS WEBDA database, 89 of them have a high cluster membership probability. Their mean distance from the Sun is 555+/-74pc, excluding four stars which seem to be field stars. The main sequence starts at spectral class B7 V which corresponds to a cluster age of about 150 million years. Cluster members show a differential interstellar extinction ranging from 0.8 to 1.8mag. The mean extinction of the cluster stars is 1.12+/-0.25mag. Interstellar extinction in the area is dominated by the Taurus dark cloud complex at 160pc. Color excesses of individual stars correlate well with the 100um dust thermal emission intensity. The cluster shape is investigated by counting stars down to K=15.6mag and is found to be elongated in the direction roughly perpendicular to the Milky Way, with the flattening 0.4.2005BaltA..14..179Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/BaltA/14/179CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/BaltA/14/179https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/BaltA/14/179http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/BaltA/14/179https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/BaltA/14/179https://vizier.iucaa.in/viz-bin/votable?-source=J/BaltA/14/179http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/BaltA/14/179GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/BaltA/14/179/table2 (The results of CCD photometry of the NGC 1647 field)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/BaltA/14/179/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/BaltA/14/179/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/BaltA/14/179/table2?GETtext/xml+votable180.050000true71.4762518.9497220.005555555555555556Cone search capability for table J/BaltA/14/179/table1 (Photoelectric standards in NGC 1647 measured in 2003 with the 1.5m telescope on Mt. Lemmon, Arizona)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/BaltA/14/179/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/BaltA/14/179/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/BaltA/14/179/table1?GETtext/xml+votable180.050000true71.4762518.9497220.0055555555555555566/24225 24228-242303.561607812030676e-19 3.741500294832266e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/BaltA/14/179?format=asciiOpticaldefaultJ/BaltA/14/179/table2The results of CCD photometry of the NGC 1647 fieldrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintMSimbad column added by the CDSmeta.ref.urlcharSeqSequential number, Cl* NGC 1647 ZSC NNNN in Simbadmeta.recordintprimaryn_Seq[*] indicates a note in notes.dat filemeta.notecharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagVilnius V magnitudemagphot.mag;em.opt.VfloatU-V? Vilnius U-V colour indexmagphot.color;em.opt.U;em.opt.Vfloatnullableu_U-VUncertainty flag on U-Vmeta.code.error;phot.color;em.opt.UcharP-V? Vilnius P-V colour indexmagphot.color;em.opt.V;em.opt.Ufloatnullableu_P-VUncertainty flag on P-Vmeta.code.errorcharX-VVilnius X-V colour indexmagphot.color;em.opt.V;em.opt.BfloatY-VVilnius Y-V colour indexmagphot.color;em.opt.B;em.opt.VfloatZ-VZ-V colour indexmagphot.color;em.opt.V;em.opt.VfloatV-SVilnius V-S colour indexmagphot.color;em.opt.V;em.opt.RfloatSpTypePhotometric spectral typesrc.spTypecharJ/BaltA/14/179/table3Photometric classification, extinctions and distancesSpTypePhotometric typesrc.spTypecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential number, Cl* NGC 1647 ZSC NNNN in Simbadmeta.recordintVmagVilnius V magnitudemagphot.mag;em.opt.VfloatVMAGAbsolute V magnitudemagphys.magAbs;em.opt.VfloatY-VVilnius Y-V colour indexmagphot.color;em.opt.B;em.opt.VfloatAVAbsorption in V bandmagphot.mag;em.opt.VfloatDistDistancepcpos.distance;pos.heliocentricintPmemb? Membership probabilitymeta.code.memberfloatnullableNoteNotemeta.notecharJ/BaltA/14/179/table1Photoelectric standards in NGC 1647 measured in 2003 with the 1.5m telescope on Mt. Lemmon, ArizonarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharSeqSequential number, Cl* NGC 1647 ZSC NNNN in Simbadmeta.recordintRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainVmagVilnius V magnitudemagphot.mag;em.opt.Vfloato_VmagNumber of independent observationsmeta.numberinte_Vmagrms uncertainty on Vmagmagstat.error;phot.mag;em.opt.VfloatU-VVilnius U-V colour indexmagphot.color;em.opt.U;em.opt.Vfloate_U-Vrms uncertainty on U-Vmagstat.error;phot.color;em.opt.UfloatP-VVilnius P-V colour indexmagphot.color;em.opt.V;em.opt.Ufloate_P-Vrms uncertainty on P-Vmagstat.errorfloatX-VVilnius X-V colour indexmagphot.color;em.opt.V;em.opt.Bfloate_X-Vrms uncertainty on X-Vmagstat.errorfloatY-VVilnius Y-V colour indexmagphot.color;em.opt.B;em.opt.Vfloate_Y-Vrms uncertainty on Y-Vmagstat.errorfloatZ-VVilnius Z-V colour indexmagphot.color;em.opt.V;em.opt.Vfloate_Z-Vrms uncertainty on Z-Vmagstat.errorfloatV-SVilnius V-S colour indexmagphot.color;em.opt.V;em.opt.Rfloate_V-Srms uncertainty on V-Smagstat.errorfloatJ/BaltA/14/179/notesIndividual notesSeqSequential number (Cl* NGC 1647 ZSC NNNN in Simbad)meta.recordintNoteText of the notemeta.note