UBVRI mag of 3 Open Cluster Remnants candidatesJ/A+A/428/67ivo://CDS.VizieR/J/A+A/428/67doi:10.26093/cds/vizier.34280067CDSVillanova S.Carraro G.de la Fuente Marcos R.Stagni R.2022-11-17T14:36:08Z2022-11-17T15:34:27ZCDS support team
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
cds-question@unistra.fropen-star-clustersinfrared-photometryvisible-astronomybroad-band-photometryccd-photometryWe present CCD UBVI photometric and medium/high resolution spectroscopic observations obtained in the field of the previously unstudied dissolving open cluster candidates NGC 5385, NGC 2664 and Collinder 21. Our analysis is based on the discussion of star counts, photometry, radial velocity distribution, and proper motions available from the Tycho 2 catalogue (<I/259>). All three aggregates clearly emerge from the mean Galactic field, but, regrettably, the close scrutiny of proper motions and radial velocities reveals that we are not facing any physical group. Instead, what we are looking at are just chance alignments of a few bright unrelated stars. Our analysis casts some doubt on the Bica et al. (2001A&A...366..827B) criterion to look for Possible Open Cluster Remnants. It seems mandatory to define a better criterion to adopt for further investigations.2004A&A...428...67Vhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/428/67CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/259 : The Tycho-2 Catalogue (Hog+ 2000)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/428/67https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/428/67http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/428/67https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/428/67https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/428/67http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/428/67GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/428/67/table1 (Photometry of NGC 5385)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/428/67/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/428/67/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/428/67/table1?GETtext/xml+votable180.050000true208.225426176.16658720.005555555555555556Cone search capability for table J/A+A/428/67/table2 (Photometry of NGC 2664)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/428/67/table2?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/428/67/table2?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/428/67/table2?GETtext/xml+votable180.050000true131.796510312.63294310.005555555555555556Cone search capability for table J/A+A/428/67/table3 (Photometry of Collinder 21)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/428/67/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/428/67/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/428/67/table3?GETtext/xml+votable180.050000true27.54884427.0329090.0055555555555555566/2121 4320 12172-121733.322582951404819e-19 3.852589004194616e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/428/67?format=asciiOpticalInfrareddefaultJ/A+A/428/67/table1Photometry of NGC 5385Vmag?=99.9999 V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag?=99.9999 error in Vmagmagstat.error;phot.magfloatnullableB-V?=99.9999 (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V?=99.9999 error in (B-V)magstat.error;phot.color;em.opt.BfloatnullableU-B?=99.9999 (U-B) color indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B?=99.9999 error in (U-B)magstat.error;phot.color;em.opt.UfloatnullableV-I?=99.9999 (V-I) color indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I?=99.9999 error in (V-I)magstat.error;phot.color;em.opt.VfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintXposX coordinates (1)pixpos.cartesian.x;instr.detdoubleYposY coordinates (1)pixpos.cartesian.y;instr.detdouble_RAComputed by VizieR with position list (right ascension part)degpos.eq.ra;meta.main_DEComputed by VizieR with position list (declination part)degpos.eq.dec;meta.main
J/A+A/428/67/table2Photometry of NGC 2664SeqSequential numbermeta.recordintVmag?=99.9999 V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag?=99.9999 error in Vmagmagstat.error;phot.magfloatnullableB-V?=99.9999 (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V?=99.9999 error in (B-V)magstat.error;phot.color;em.opt.BfloatnullableU-B?=99.9999 (U-B) color indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B?=99.9999 error in (U-B)magstat.error;phot.color;em.opt.UfloatnullableV-I?=99.9999 (V-I) color indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I?=99.9999 error in (V-I)magstat.error;phot.color;em.opt.VfloatnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintXposX coordinates (1)pixpos.cartesian.x;instr.detdoubleYposY coordinates (1)pixpos.cartesian.y;instr.detdouble_RAPosition computed from a comparison with UCAC2 catalog I/289 ({sigma}=0.2'') (right ascension part)degpos.eq.ra;meta.main_DEPosition computed from a comparison with UCAC2 catalog I/289 ({sigma}=0.2'') (declination part)degpos.eq.dec;meta.main
J/A+A/428/67/table3Photometry of Collinder 21Vmag?=99.9999 V band magnitudemagphot.mag;em.opt.Vfloatnullablee_Vmag?=99.9999 error in Vmagmagstat.error;phot.magfloatnullableB-V?=99.9999 (B-V) color indexmagphot.color;em.opt.B;em.opt.Vfloatnullablee_B-V?=99.9999 error in (B-V)magstat.error;phot.color;em.opt.BfloatnullableU-B?=99.9999 (U-B) color indexmagphot.color;em.opt.U;em.opt.Bfloatnullablee_U-B?=99.9999 error in (U-B)magstat.error;phot.color;em.opt.UfloatnullableV-I?=99.9999 (V-I) color indexmagphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I?=99.9999 error in (V-I)magstat.error;phot.color;em.opt.Vfloatnullable_RAComputed by VizieR with position list (right ascension part)degpos.eq.ra;meta.main_DEComputed by VizieR with position list (declination part)degpos.eq.dec;meta.mainrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqSequential numbermeta.recordintXposX coordinates (1)pixpos.cartesian.x;instr.detdoubleYposY coordinates (1)pixpos.cartesian.y;instr.detdouble