J/BaltA/18/33ivo://CDS.VizieR/J/BaltA/18/33doi:10.26093/cds/vizier/bm-j-11CDSZdanavicius K.Zdanavicius J.Straizys V.Maskoliunas M.2026-03-17T20:06:43Z2009-10-01T07:54:30ZCDS support team

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

cds-question@unistra.frmolecular-cloudsapparent-magnitudestellar-spectral-typesInterstellar extinction is investigated in a 1.5 square degree area in the direction of the reflection nebula NGC7023 at l=104.1{deg}, b=+14.2{deg}. The study is based on photometric classification and the determination of interstellar extinctions and distances of 480 stars down to V=16.5mag from photometry in the Vilnius seven-color system published in Paper I (2008BaltA..17..161Z). The investigated area is divided into five smaller subareas with slightly different dependence of the extinction on distance. The distribution of reddened stars is in accordance with the presence of two dust clouds at 282pc and 715pc, however in some directions the dust distribution can be continuous or more clouds can be present.2009BaltA..18...33Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/BaltA/18/33CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/BaltA/18/33https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/BaltA/18/33http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/BaltA/18/33https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/BaltA/18/33https://vizier.iucaa.in/viz-bin/votable?-source=J/BaltA/18/33http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/BaltA/18/33GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/BaltA/18/33/table1Stars in the investigated area with most reliable spectral-types determined from Vilnius photometryrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordint[ZZS2008]Sequential numbermeta.recordintVmagVilnius V magnitudemagphot.mag;em.opt.VfloatSpTypeMK spectral typesrc.spTypechare_SpTypeAccuracy estimates of spectral typesstat.error;src.spTypefloatVMAGAbsolute V magnitudemagphys.magAbs;em.opt.VfloatAVAbsorption in V bandmagphot.mag;em.opt.VfloatDistHeliocentric distancepcpos.distanceintSubAreaSubArea number I to V (central part), used in Fig.2obs.fieldnullable