J/AJ/140/2025ivo://CDS.VizieR/J/AJ/140/2025doi:10.26093/cds/vizier.51402025CDSHerbst W.Leduc K.Hamilton C.M.Winn J.N.Ibrahimov M.Mundt R.,Johns-Krull C.M.2017-07-04T07:08:57Z2012-08-08T14:33:40ZCDS support team

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

cds-question@unistra.frpre-main-sequence-starsmultiple-starsvisible-astronomykron-cousins-photometryPhotometry of the unique pre-main-sequence binary system KH 15D is presented, spanning the years 2005-2010. This system has exhibited photometric variations and eclipses over the last ~50 years that are attributed to the effect of a precessing circumbinary disk. Advancement of the occulting edge across the projection on the sky of the binary orbit has continued and the photospheres of both stars are now completely obscured at all times. The system has thus transitioned to a state in which it should be visible only by scattered light, and yet it continues to show a periodic variation on the orbital cycle with an amplitude exceeding 2mag.2010AJ....140.2025Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/140/2025CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/140/2025https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/140/2025http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/140/2025https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/140/2025https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/140/2025http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/140/2025GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tap2.367228618189496e-19 2.6706780932288093e-19OpticaldefaultJ/AJ/140/2025/table3Photometry of KH 15D from 1995-2009recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDGeocentric Julian Date of the observationdtime.epochdoubleImagCousins I band magnitudemagphot.mag;em.opt.Ifloate_Imag? Uncertainty in Imagmagstat.error;phot.mag;em.opt.IfloatnullableV-I? V-I Johnson-Cousins color index (1)magphot.color;em.opt.V;em.opt.Ifloatnullablee_V-I? Uncertainty in V-I (1)magstat.error;phot.color;em.opt.VfloatnullableDXWinn et al. (2006ApJ...644..510W) Model #3 {Delta}X parameterstat.param;meta.modelledfloatObsObservatory code (2)meta.code;instr.obstychar