J/A+AS/121/455ivo://CDS.VizieR/J/A+AS/121/455CDSKaluzny J.1997-12-09T18:26:53Z1997-12-09T19:26:40ZCDS support team

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

cds-question@unistra.frccd-photometryopen-star-clustersWe present CCD BVI photometry for Berkeley 18, a rich open cluster located in the Galactic anticenter. The cluster age is similar to, or marginally lower than age of M 67. Its distance is estimated at 5.8kpc and the reddening E(B-V) is probably higher than 0.46. Our data indicate that Be 18 is one of the most populous objects in the whole sample of known galactic open clusters. The angular diameter of the cluster is estimated at 26arcmin, which corresponds to a linear size of about 44pc. The horizontal branch of Be 18 exhibits a large width in comparison with other old open clusters.1997A&AS..121..455Khttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+AS/121/455CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+AS/108/151 : Berkeley 22 & Berkeley 29 CCD photometry (Kaluzny, 1994)J/A+AS/114/1 : CCD UBVI photometry of NGC 6791 (Kaluzny+, 1995)J/A+AS/133/25 : CCD BVI photometry of Trumpler 5 (Kaluzny 1998)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+AS/121/455https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+AS/121/455http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+AS/121/455https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+AS/121/455https://vizier.iucaa.in/viz-bin/votable?-source=J/A+AS/121/455http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+AS/121/455GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+AS/121/455/table3BV photometry of stars from Berkeley 18 field October 91, 2.1-m telescope datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID numbermeta.id;meta.mainintXposX coordinate (1)pixpos.cartesian.x;instr.detfloatYposY coordinate (1)pixpos.cartesian.y;instr.detdoubleVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.errorfloato_Vmagnumber of averaged V measurementsmeta.numberintq_Vmagquality flag for Vmag (2)meta.code.qualintB-V? B-V color indexmagphot.color;em.opt.B;em.opt.Vfloate_B-V? rms uncertainty on B-V (3)magstat.errorfloato_B-VNumber of averaged B measurementsmeta.numberintq_B-VQuality flag for B-Vmeta.code.qualintV-I? V-I color indexmagphot.color;em.opt.V;em.opt.Ifloate_V-I? rms uncertainty on V-I (3)magstat.errorfloato_V-I? Number of averaged I measurementsmeta.numberintq_V-I? Quality flag for V-Imeta.code.qualintJ/A+AS/121/455/table4BV photometry of stars from Berkeley 18 field October 92, 2.1-m telescope datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXposX coordinate (1)pixpos.cartesian.x;instr.detfloatYposY coordinate (1)pixpos.cartesian.y;instr.detdoubleVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.errorfloato_Vmagnumber of averaged V measurementsmeta.numberintq_Vmagquality flag for Vmag (2)meta.code.qualinte_B-V? rms uncertainty on B-V (3)magstat.errorfloato_B-VNumber of averaged B measurementsmeta.numberintq_B-VQuality flag for B-Vmeta.code.qualintV-I? V-I color indexmagphot.color;em.opt.V;em.opt.Ifloate_V-I? rms uncertainty on V-I (3)magstat.errorfloato_V-I? Number of averaged I measurementsmeta.numberintq_V-I? Quality flag for V-Imeta.code.qualintB-V? B-V color indexmagphot.color;em.opt.B;em.opt.VfloatIDID numbermeta.id;meta.mainintJ/A+AS/121/455/table5BV photometry of stars from Berkeley 18 field October 92, 0.9-m telescope datarecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID numbermeta.id;meta.mainintXposX coordinate (1)pixpos.cartesian.x;instr.detfloatYposY coordinate (1)pixpos.cartesian.y;instr.detdoubleVmagV magnitudemagphot.mag;em.opt.Vfloate_Vmagrms uncertainty on Vmagmagstat.errorfloato_Vmagnumber of averaged V measurementsmeta.numberintq_Vmagquality flag for Vmag (2)meta.code.qualintB-V? B-V color indexmagphot.color;em.opt.B;em.opt.Vfloate_B-V? rms uncertainty on B-V (3)magstat.errorfloato_B-VNumber of averaged B measurementsmeta.numberintq_B-VQuality flag for B-Vmeta.code.qualintV-I? V-I color indexmagphot.color;em.opt.V;em.opt.Ifloate_V-I? rms uncertainty on V-I (3)magstat.errorfloato_V-I? Number of averaged I measurementsmeta.numberintq_V-I? Quality flag for V-Imeta.code.qualint