J/AJ/170/277ivo://CDS.VizieR/J/AJ/170/277CDSZhang W.Schneider A.C.Bickle T.P.Burgasser A.J.Softich E.,Marocco F.Bardalez Gagliuffi D.Faherty J.K.Meisner A.M.,Kirkpatrick J.D.Kuchner M.J.Kabatnik M.Kiwy F.Sainio A.,Jorg SchumannSelg-Mann K.Stevnbak Andersen N.Baller B.Beaulieu P.,Bell J.Caselden D.Colin G.Dereveanco A.Frank C.Glebov K.,Gramaize L.Hamlet L.K.Martin D.W.Pendrill W.Perlin S.Stenner A.,Tanner C.Thevenot M.Thakur V.2026-08-05T14:28:59Z2026-08-05T14:43:18ZCDS support team

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

cds-question@unistra.frm-starsproper-motionsinfrared-photometryvisible-astronomybroad-band-photometryinfrared-astronomymorgan-keenan-classificationWe used the third data release of the UKIRT Hemisphere Survey to locate previously unrecognized high proper motion objects. We identify a total of 127 new discoveries with total proper motions >=300mas/yr. A significant fraction of these sources with counterparts in the Gaia DR3 catalog are found to be distant (>100pc) low-mass stars, where their large tangential velocities and placement on color-magnitude diagrams suggest that they are likely low-metallicity M-type subdwarfs. Optical spectroscopy is used to confirm the low mass and low metallicity for two such sources. Using available optical and infrared photometry, we estimate the spectral type for all non-Gaia sources and find 10 likely late-M dwarfs, 15 objects with colors most consistent with L-type dwarfs, and nine possible T-type dwarfs. Follow-up spectroscopy is needed to confirm spectral types and further characterize these new discoveries.2025AJ....170..277Zhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/170/277CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/350 : Gaia EDR3 (Gaia Collaboration, 2020)I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)I/351 : The extended Gaia-PS1-SDSS (GPS1+) proper motion catalog (Tian+, 2020)II/316 : UKIDSS-DR6 Galactic Plane Survey (Lucas+ 2012)II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)II/328 : AllWISE Data Release (Cutri+ 2013)II/363 : The band-merged unWISE Catalog (Schlafly+, 2019)II/365 : The CatWISE2020 catalog (updated version 28-Jan-2021) (Marocco+, 2021)II/389 : The Pan-STARRS release 1 (PS1) Survey - DR2 (Magnier+, 2025)J/AJ/143/67 : SLoWPoKES.II. Properties of wide, low-mass binar. (Dhital+, 2012)J/ApJS/201/19 : Hawaii Infrared Parallax Program. I. (Dupuy+, 2012)J/ApJ/783/122 : AllWISE motion survey (Kirkpatrick+, 2014)J/ApJS/224/36 : The AllWISE motion survey (AllWISE2) (Kirkpatrick+, 2016)J/ApJ/817/112 : NEOWISE/AllWISE high proper motion objects (Schneider+, 2016)J/AJ/157/63 : Rad. relations for low-metall. M-dwarf stars (Kesseli+, 2019)J/AJ/157/231 : MLSDSS-GaiaDR2 sample of M and L dwarfs (Kiman+, 2019)J/A+A/628/A61 : X-shooter spectra of 43 metal-poor M dwarfs (Lodieu+, 2019)J/AJ/159/30 : High proper-motion M-type stars spectr. obs. (Hejazi+, 2020)J/A+A/649/A6 : Gaia Cat. of Nearby Stars - GCNS (Gaia collaboration, 2021)J/ApJ/908/131 : M-subdwarf research. II. Cat. of ~3000 subdwarfs (Zhang+, 2021)J/ApJ/927/122 : Chem. properties of the local disk & halo. II. (Hejazi+, 2022)J/AJ/166/103 : UKIRT Hemisphere Survey L, T & Y dwarfs cat. (Schneider+, 2023)J/ApJS/271/55 : A full-sky 20pc census of stars & BDs (Kirkpatrick+, 2024)J/A+A/695/A195 : New ultracool dwarf candidates from unTimely (Karpov+, 2025)J/ApJS/280/15 : Extinction catalog from Gaia DR3 & LAMOST DR11 (Wang+, 2025)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/170/277https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/170/277http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/170/277https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/170/277https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/170/277http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/170/277GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/170/277/table1 (UHS high proper motion discovery properties)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/170/277/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/170/277/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/170/277/table1?GETtext/xml+votable180.050000true2.267852233.10812970.005555555555555556Cone search capability for table J/AJ/170/277/table3 (Spectral type estimates for Gaia sources)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/170/277/table3?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/170/277/table3?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/170/277/table3?GETtext/xml+votable180.050000true2.265018933.10805250.0055555555555555566/124 152 229 447 921 960 984 1357 1372 1523 1527 1875 2076 2315 2329 2467 2561 2590 2673 2718 2737 3114 3133 4220 4383 4416 4488 5230 5340 5347 5383 5405 5412 5441 5531 5765 6146 6348 6372 6398 6740 6777 6841 6847 6901 6973 7236 7374 8399 8411 8464 8700 8750 8824 8901 8904 9118 9194 9553 9821 10498 10523 10556 10744 10853 11070 11120 11373 11400 11406 12461 12598 12689 12726 12832 12886 13429 13470 14093 14947 15043 15331 19147 19361 19963-19964 20058 20421 21985 21994 22308 22461 22497 23127 23225 23246 23292 23394 23397 23416 23423 23432 23648 23869 23879 23900 24167 24537 27891 27893 28216 28467 28586 30390 30578 31574 31622 31872 31893 31956 31985 32107 32118 32166 32248 32253 326593.830199579824256e-20 4.670716440110116e-19https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/170/277?format=asciiOpticalInfrareddefaultJ/AJ/170/277/table1UHS high proper motion discovery propertiesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUHSUHS DR3 name (UHS-Name)meta.id;meta.maincharRAJ2000UHS DR3 right ascension (J2000) (RAdeg-UHS)degpos.eq.ra;meta.mainDEJ2000UHS DR3 declination (J2000) (DEdeg-UHS)degpos.eq.dec;meta.mainEpoch[2013.39/2024.06] Epoch of UHS DR3 positionyrtime.epochdoublepmRA-UHS[-507.72/467.73] UHS proper motion in RAmas/yrpos.pm;pos.eq.rafloate_pmRA-UHS[2.52/18.32] Uncertainty of UHS proper motion in RAmas/yrstat.error;pos.pmfloatpmDE-UHS[-547.98/227] UHS proper motion in DEmas/yrpos.pm;pos.eq.decfloate_pmDE-UHS[2.52/18.32] Uncertainty of UHS proper motion in DEmas/yrstat.error;pos.pmfloatJmag[14.86/18.72]? UHS J magnitudemagphot.mag;em.IR.Jfloatnullablee_Jmag[5e-3/0.11]? Uncertainty of UHS J magnitudemagstat.error;phot.mag;em.IR.JfloatnullableHmag[14.15/18.85]? UHS H magnitudemagphot.mag;em.IR.Hfloatnullablee_pmRA-Gaia[0.05/2.22]? Uncertainty of Gaia DR3 proper motion in RAmas/yrstat.error;pos.pmfloatnullablepmDE-Gaia[-438.26/100.95]? Gaia DR3 proper motion in DEmas/yrpos.pm;pos.eq.decfloatnullablee_pmDE-Gaia[0.06/1.39]? Uncertainty of Gaia DR3 proper motion in DEmas/yrstat.error;pos.pmfloatnullableGmag[17.18/21.1]? Gaia DR3 G magnitudemagphot.mag;em.optfloatnullablee_Gmag[3e-3/0.02]? Uncertainty of Gaia DR3 G magnitudemagstat.error;phot.mag;em.optfloatnullableBPmag[18.4/22.09]? Gaia DR3 G_RP magnitudemagphot.mag;em.opt.Bfloatnullablee_BPmag[0.01/0.46]? Uncertainty of Gaia DR3 G_RP magnitudemagstat.error;phot.mag;em.opt.BfloatnullableRPmag[16.08/19.73]? Gaia DR3 G_BP magnitudemagphot.mag;em.opt.Rfloatnullablee_RPmag[5e-3/0.15]? Uncertainty of Gaia DR3 G_BP magnitudemagstat.error;phot.mag;em.opt.RfloatnullableVtan[192/961]? Tangential velocitykm/sphys.veloc.transverseintnullablee_Vtan[1/1360]? Uncertainty of tangential velocitykm/sstat.error;phys.veloc.transverseintnullablePS1Pan-Starrs DR2 designationmeta.idcharcatPS1Link to the Pan-STARRS1 DR2 catalog (II/389) for sources within 1"meta.ref.urlintnullablegmag[18.85/22.24]? Pan-Starrs g magnitudemagphot.mag;em.opt.Bfloatnullablee_gmag[2e-3/0.22]? Uncertainty of Pan-Starrs g magnitudemagstat.error;phot.mag;em.opt.Bfloatnullablermag[17.49/22.05]? Pan-Starrs r magnitudemagphot.mag;em.opt.Rfloatnullablee_rmag[2e-3/0.19]? Uncertainty of Pan-Starrs r magnitudemagstat.error;phot.mag;em.opt.Rfloatnullableimag[16.51/22.03]? Pan-Starrs i magnitudemagphot.mag;em.opt.Ifloatnullablee_imag[2e-3/0.24]? Uncertainty of Pan-Starrs i magnitudemagstat.error;phot.mag;em.opt.Ifloatnullablezmag[16.04/21.13]? Pan-Starrs z magnitudemagphot.mag;em.opt.Ifloatnullablee_zmag[2e-3/0.21]? Uncertainty of Pan-Starrs z magnitudemagstat.error;phot.mag;em.opt.Ifloatnullableymag[15.83/20.61]? Pan-Starrs y magnitudemagphot.mag;em.IR.JfloatnullableSimbadNameSimbad column added by the CDSmeta.idcharnullablee_Hmag[5e-3/0.19]? Uncertainty of UHS H magnitudemagstat.error;phot.mag;em.IR.HfloatnullableKmag[13.89/18.64]? UHS K magnitudemagphot.mag;em.IR.Kfloatnullablee_Kmag[7e-3/0.31]? Uncertainty of UHS K magnitudemagstat.error;phot.mag;em.IR.KfloatnullableDiscDiscoverer Code from the Backyard Worlds: Planet 9 Citizen Science Project (BYW-discoverer-code) (1)obs.observercharGaiaDR3Gaia DR3 (I/355) source identifier (Name-Gaia)meta.idcharplx-Gaia[1.57/8.9]? Gaia DR3 parallaxmaspos.parallax.trigfloatnullablee_plx-Gaia[0.06/2.28]? Uncertainty of Gaia DR3 parallaxmasstat.error;pos.parallax.trigfloatnullablepmRA-Gaia[-395.76/446.4]? Gaia DR3 proper motion in RAmas/yrpos.pm;pos.eq.rafloatnullablee_ymag[1e-3/0.25]? Uncertainty of Pan-Starrs y magnitudemagstat.error;phot.magfloatnullableCWISECatWISE 2020 (II/365) designationmeta.idcharW1mag[13.71/17.99]? CatWISE 2020 W1 magnitude (Name-CWISE)magphot.mag;em.IR.3-4umfloatnullablee_W1mag[0.01/0.13]? Uncertainty of CatWISE 2020 W1 magnitudemagstat.error;phot.mag;em.IR.3-4umfloatnullableW2mag[13.55/17.84]? CatWISE 2020 W2 magnitudemagphot.mag;em.IR.4-8umfloatnullablee_W2mag[0.01/0.31]? Uncertainty of CatWISE 2020 W2 magnitudemagstat.error;phot.mag;em.IR.4-8umfloatnullableNoteNote (2)meta.notecharJ/AJ/170/277/table3Spectral type estimates for Gaia sourcesSimbadNameSimbad column added by the CDSmeta.idcharnullablerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUHSUHS DR3 Namemeta.id;meta.maincharSpTypeSpectral type, photometric estimate (1)src.spTypechar_RAPosition from Simbad (right ascension part)degpos.eq.ra;meta.main_DEPosition from Simbad (declination part)degpos.eq.dec;meta.mainJ/AJ/170/277/table4Properties of non-Gaia sourcesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintUHSUHS DR3 namemeta.id;meta.maincharSpTypeSpectral type, photometric estimatesrc.spTypecharDist[36/682] Distance (1)pcstat.error;pos.distanceinte_Dist[7/157] Uncertainty in Distpcstat.errorintVtan[59/1271] Tangential velocity (1)km/sphys.veloc.transverseinte_Vtan[11/268] Uncertainty in Vtankm/sstat.error;phys.veloc.transverseint