J/MNRAS/549/G853ivo://CDS.VizieR/J/MNRAS/549/G853CDSQuintana A.LWright N.JKormann L.A.Alves J.Katz D.Casamiquela L.,Di Matteo P.Haywood M.Laporte C.2026-06-11T14:39:15Z2026-06-08T08:41:48ZCDS support team

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

cds-question@unistra.frmilky-way-galaxystellar-associationsob-starsoptical-observationcatalogsvisible-astronomyOB associations are primordial tracers of star formation and Galactic structure. Originally defined about 80 years ago, their historical membership lists have been superseded thanks to the precise astrometry from ESA's Gaia's satellite. Recent studies have however been mostly focused on individual OB associations or limited by the coverage of spectroscopic surveys. In this paper, we exploit a complete census of ~25000 O- and B-type stars within 1kpc of the Sun to produce a highly-reliable catalogue of 56 OB associations using the HDBSCAN clustering algorithm, increasing the number of known OB associations by a factor of two within this volume. We assess the validity of this catalogue by crossmatching our OB association members with other catalogues of OB associations, star clusters and young stellar groups, confirming the high-confidence of our census of OB associations. We characterize these OB associations physically (total initial stellar mass, number of OB stars, ...) and kinematically (velocity dispersion, linear expansion ages, ...). The majority of the OB associations (38 out of 56) exhibit a significant expansion pattern in at least one direction, including 12 in both plane-of-the-sky directions, though differences in expansion velocity suggest anisotropical expansion patterns. We compare the locations of these OB associations with superclouds and features in the local Milky Way such as the Radcliffe Wave and discuss the implications for star formation in the solar neighbourhood.2026MNRAS.549g.853Qhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/549/G853CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toI/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)J/AJ/160/279 : Untangling the Galaxy. II. Structure within 3kpcJ/A+A/686/A42 : Improving the open cluster census. III. (Hunt+, 2024)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/549/G853https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/549/G853http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/549/G853https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/549/G853https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/549/G853http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/549/G853GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/549/G853/table1 (Main catalogue)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/549/G853/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/549/G853/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/549/G853/table1?GETtext/xml+votable180.050000true56.5824.110.005555555555555556Cone search capability for table J/MNRAS/549/G853/members (OB members of the OB associations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/549/G853/members?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/549/G853/members?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/549/G853/members?GETtext/xml+votable180.050000true56.2190008624.113139090.005555555555555556Cone search capability for table J/MNRAS/549/G853/rejected (Members of the rejected candidate OB associations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/549/G853/rejected?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/549/G853/rejected?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/549/G853/rejected?GETtext/xml+votable180.050000true62.1655268147.712371140.0055555555555555565/329 333 337 345 442 814 819-820 823 900 902 906 909 911 3436 3524 3576 3586 3594 3613 3655 3658 3672-3673 3675 3869 3913 3918 3920-3921 3931 5189 5191 5197 5202 5208 5414 5417 5420 5553 5715 5720-5721 5723 5748 6086 6112 7171 7177 7184 7269 7271 7480 7482-7483 7485 8016-8017 8031 9432 9466 9471 9484 9798 9801 9803-9804 9810 9814-9815 9820 9841 9964 9966-9967 9970 10361 10417 10437 10531 10556-10558 10578 10759 10825 6/89 257 263 405 461 463 472 474 496 511 965 1032 1038 1040 1069 1081 1085 1089 1117 1128-1129 1164 1181 1194 1197 1199 1202-1204 1208 1212-1213 1219 1227 1261 1284 1287 1293 1295 1299 1304-1306 1309 1311 1324-1325 1327-1328 1330-1331 1337 1340-1341 1344 1347 1353-1354 1357-1360 1363 1366 1368 1388-1389 1391-1392 1401-1402 1413-1415 1422 1424 1426-1428 1430-1432 1434-1436 1438 1456-1457 1462 1464-1466 1468 1473 1476-1478 1481-1484 1487-1489 1498 1504 1506-1507 1511 1539-1541 1549-1550 1554-1555 1560-1561 1583 1633 1651 1660 1687 1697 1705-1706 1708 1720 1732-1733 1735 1737-1739 1741-1742 1745 1748 1755 1757 1759-1760 1763-1764 1766 1773-1774 1799 1802-1803 1806 1824 1826 1834 1927 1931-1934 1946 1954 1967 2394-2395 2417 2500 2519 2527 2556 2911 2934-2935 2939-2940 2977 2986 2991 3001-3006 3033 3035-3036 3038 3045-3046 3048-3050 3052 3055 3059 3064 3068 3071 3093 3100 3109-3110 3127 3132 3136-3138 3144 3146 3160 3165-3166 3168 3181 3183 3186 3188 3190 3192-3193 3195-3196 3198 3212-3213 3225 3227-3228 3230 3239 3245-3247 3249-3252 3254 3270-3271 3273 3275 3285-3286 3288-3289 3297-3299 3301-3303 3306-3307 3309-3313 3315-3317 3322 3324 3326-3327 3335-3336 3342 3360 3362 3364 3369-3370 3458 3460 3464 3590 3593 3595 3597-3599 3605 3613-3614 3616-3617 3620-3621 3630 3632 3635 3640 3643 3650-3652 3654 3656-3657 3659-3660 3666 3680-3682 3704 3706 3710 3715 3717-3718 3722-3725 3727 3739 3754-3755 3776 3782-3783 3792 3794-3798 3800 3849 3854 3874-3875 3878 3884 3888 3968 6828 6831 12902 12918 12938-12939 12963-12964 12966-12969 12971-12973 12975-12976 12978 12984-12985 13013 13090 13096 13098-13099 13102-13103 13232 13246 13306-13307 13310-13311 13533-13535 13554 13556-13557 13559 13565-13566 13706 13708 13722-13723 13729-13731 13735-13737 13739 13741 13749 13753 13757-13758 13910 13947 13968 13970-13971 13973-13974 13977 13980 13983 13992-13994 13996 14008-14010 14015 14036 14045 14058 14072 14081 14087 14091 14094 14104-14105 14112-14113 14117 14132 14160 14162 14165 14167 14174-14175 14183 14188 14193-14196 14199 14201-14202 14204 14206 14210 14214-14216 14219-14220 14230 14238 14247-14248 14261 14263-14264 14266 14269 14272 14275 14278-14280 14283 14287 14289-14291 14293-14298 14301-14303 14308 14310 14312-14313 14315 14320 14322 14327 14335-14336 14338 14341 14355 14363 14368-14370 14372 14375 14383 14401-14403 14405-14408 14410 14412-14414 14418 14420 14424 14428 14430 14432-14433 14436 14438 14446 14449 14458 14482 14500 14505 14508 14520 14523 14527 14557 14563 14571 14600 14603-14606 14610 14625 14637-14638 14640-14641 14644-14645 14650-14651 14653-14654 14664 14666-14667 14669-14670 14676-14677 14679-14680 14682 14704 14706-14707 14710-14712 14718 14724-14726 14750 14772 14784 14790-14793 14796-14797 14799 14806 14849 14854 14861-14862 14871 14876 14878 14897 14901 14919 14921-14922 14925 14927 14930 14938 14945 14964 15360-15362 15365 15367-15369 15371-15373 15376 15378-15379 15383-15386 15392-15393 15396 15400 15408 15411 15438 15453 15484-15485 15504 15514 15519 15537 15558 15560-15561 15566 15616 15631 15642 15645-15646 15650 15659 15661-15664 15666-15667 15688-15689 15692-15693 15695-15696 15698-15699 15701-15702 15705-15706 15714 15722 15730 15736-15737 15748-15749 20741-20743 20751 20753-20754 20761-20763 20773 20787 20793 20797-20800 20804-20805 20817-20818 20822 20824 20837 20840 20846-20847 20856 20883 20895 20918 20921 20939 20968 20970-20971 20982 21269 21333 21365 21403 21430 21434-21436 21438-21439 21456 21479 21482 21507 21517 21528-21529 21531-21532 21551 21553-21555 21561 21564 21566 21610 21637 21639-21641 21644-21645 21647 21660 21665 21667 21672-21673 21676-21677 21685-21689 21693 21736 22030 22032 22046 22051 22056 22058-22059 22067 22069-22071 22073-22074 22078-22079 22091 22113-22114 22121-22123 22125-22126 22136 22145 22158 22170 22183 22209-22210 22217-22218 22221 22225 22232 22234 22237 22247 22260 22262-22263 22269 22271 22432 22790 22804-22805 22808 22815 22837 22845 22848-22850 22852 22854 22857-22859 22872 22874 22879 22888-22890 22896 22898 22900 22904 22906-22908 22981 23000 23298 23319 23345 23451 23464 23493 23509 23553 23569 23572 23577 23585 23594 23621-23624 23631-23633 23636-23637 23639 23649 23654 23660 23663-23664 23667 23674 23745 23749 23751 23757 23761-23763 23766-23769 23772 23793 23798 23808 23818 23850 23938 23973-23974 23980 23983 23990 23992 23994 23998-23999 24058 24107-24108 24179 24188 24206 24228 24230 24242-24243 24247 24269 24275 24277-24279 24281 24286-24287 24290-24291 24294 24296 24303 24313 24315 24326 24332 24335-24336 24338-24339 24341 24348 24350-24351 24356-24357 24359 24361 24363-24364 24366-24367 24370 24372-24373 24375-24376 24378 24387 24389-24391 24393 24395 24398-24399 24401 24418-24419 24421 24423-24425 24428 24431 24452-24453 24464-24466 24469 24472 24478 24493 24497 24501 24507 24510-24511 24519-24521 24525 24527-24528 24536 24539-24540 24544 24546-24548 24552 24555 24558 24560 24562-24564 24566 24570 24574 28676-28677 28679 28681-28683 28690 28692 28698 28700 28702 28705 28713 28717 28725 28742-28746 28748 28763 28768 28787 28799 28802 28805-28807 28809 28812 28826-28827 28832-28834 28836 28848-28849 28853 28885 28896 28909 28960 28962 28968 29025-29027 29032-29033 29036-29038 29050 29052 29054 29057 29061-29063 29065 29071-29072 29075 29080-29081 29083 29100 29104 29109 29113 29122-29123 29126 29131 29136 29140-29141 29147-29149 29151 29169 29172 29174-29175 29183 29200 29219 29444-29445 29832 29850-29851 29858-29859 29862 29865 29867-29868 29872-29874 29877-29879 29881 29885 29887 29919 29926 29937 29939 29944-29946 29948-29949 30090 30112 30114 30120 30123 30125 30127 30212 30228 30231 30273 30276-30277 30291 30468-30469 30471 30480 30486 30492-30493 30495 30506-30507 30510-30511 30523 30538-30539 30596 30600 30609 30611-30612 30614-30615 30617 30621-30622 30656-30657 30665 30670 30686-30687 30695 30698-30700 30702-30703 30706-30710 30712-30714 32020-32021 32076 32080 32082-32085 32089-32091 32093 32095 32103 32109 32113 32115 32117-32121 32123 32209 32212 32215 32221 32604 37143 37183 37221 37223 37228-37229 37231 37240 37243 37247 37303 37313 37315-37318 37321 37323-37324 37326-37327 37332-37333 37335 37337-37338 37340 37342 37345 37347 37349-37353 37355 37357-37360 37368 37485 37491 37572-37573 37584 37586-37587 37589-37590 37592-37594 37616 37649 37651 37655 37663 37696 37698 37700-37702 37705 37707 37709-37711 37714 37720 37726 37732-37733 37737 37739 37744 37746-37747 37753 37802 37817 37824 37826 37832 37856-37857 37863 37868-37870 37880 37883 37888 37891-37892 37899-37901 37906-37908 37910 37915 37917-37919 37934 37942 37985 37990 38016 38018 38023 38028 38051 38058 38073-38074 38076 38403-38404 38408 38412 38416 38996 39172 39175 39177 39179-39181 39183 39186-39187 39189 39191 39196 39198 39200-39201 39203 39209 39211 39221 39223 39227 39233-39235 39237 39244-39245 39247-39248 39251 39254-39255 39268-39270 39277 39279 39284 39288-39289 39296-39297 39299-39300 39303 39311 39314 39316 39346 39355 39360 39362-39363 39369 39372 39374 39379-39380 39384 39392 39394-39396 39404 39513 39539-39541 39695-39697 39699 39704 39712 39714-39715 39720-39721 39728 39737-39740 39751 39762 39768-39769 39774 39782-39783 39785 39791 39793 39803-39805 39813 39820 39823 39826 39832-39834 39838-39839 39844-39846 39853 39855 39860 39862-39863 39878 39884 39889 39891 39895-39896 39898-39900 39905 39907-39908 39913-39914 39916-39917 39919-39920 39924-39925 39928-39929 39932 39946 39968 40586 40591 40610 40623 41207 41209 41211 41341 41343 41368 41379-41380 41383-41384 41388 41395-41398 41411 41413 41423 41429 41433 41435-41436 41438-41439 41441 41443 41455-41458 41460-41462 41523 41526-41527 41544 41549 41555 41557-41559 41562 41564 41583-41584 41591-41592 41594 41596 41599 41605-41607 41625 41627 41632 41637-41640 41643-41644 41658 41661 41663 41676-41677 41680-41681 41683 41685 41688-41689 41691-41692 41694 41696 41698 41705-41706 41717-41718 41728 41731 41734 41747 41753 41755-41756 41762 41765-41766 41771 41780 41787 41794 41798 41800 41810 41812 41814-41815 41817 41824-41825 41827 41833 41838 41843 41846-41848 41857-41858 41860 41863-41864 41866 41868 41872-41874 41879-41880 41891 41917 41947 41963 41995 42084 42098 42110 42117 42119-42121 42128 42133 42136 42151 42165 42172-42173 42176 42191 42197 42199 42204-42205 42207-42210 42213-42214 42216-42218 42220-42221 42223 42236-42237 42250 42269 42280 42282-42283 42285 42289 42293 42296 42305 42311 42316 42322 42328 42335 42348 42368 42370 42374 42376-42377 42379 42383 42395 42400 42402 42404 42406-42407 42412 42414 42416 42422 42424-42425 42438 42442-42444 42446 42453 42455 42457 42463 42467-42468 42470-42471 42481-42483 42485-42489 42491-42492 42497 42499 42530-42532 42549 42573 42580 42583 42589 42591 42617 42623 42635 42640 42649 42652 42658 42670 42674 42684 42696 42714 42728 42736 42738 42746 42752 42754 42757 42763 42778 42800 42832 42835 42848 42924 42932 42948 42984 43014 43018 43020 43022 43028-43029 43031 43035 43041-43043 43045-43050 43053 43056-43058 43060 43062 43064 43072 43074 43080 43097 43101 43115 43117 43127 43136-43138 43140 43153 43201 43210 43229 43238 43272 43279 43285-43286 43290 43304 43308 43310-43311 43326 43332 43345 43348 43375 43377-43378 43393 43397 43407 43414 44043-44044 44054 44101 44293 44306-44307 44310 44312-44313 44316 44321 44352 44378 44385 47779 47785 47788 47791 47793https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/549/G853?format=asciiOpticaldefaultJ/MNRAS/549/G853/table1Main cataloguerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID assigned to the OB association, ordered by increasing median line (ID)meta.idintNNumber of identified members (N)meta.numberinte_kappabError on linear velocity gradient in Galactic latitude (Err_Kappa_b)km.s**-1.pc**-1stat.errorfloatAgekinb? Linear kinematic age in Galactic latitude (Age_kin,b)Myrpos.distance;pos.galactic.latfloatnullablee_Agekinb? Error on linear kinematic age in Galactic latitude (Err_Age_kin,b)Myrstat.errorfloatnullableNOEstimated median number of systems containing a O-type star in the O (N_O)meta.numberfloate_NOLower error on NO, 16th percentile (N_O_P16)stat.errorintE_NOUpper error on NO, 84th percentile (N_O_P84)stat.error;stat.maxintRelOCsCrossmatched OCs from Hunt & Reffert (2024, Cat. J/A+A/686/A42) (Related OCs)meta.idcharRA_ICRSMedian right ascension (ICRS) at Ep=2016.0 (RA_ICRS)degpos.eq.ra;meta.mainDE_ICRSMedian declination (ICRS) at Ep=2016.0 (DE_ICRS)degpos.eq.dec;meta.mainGLONMedian Galactic longitude (GLON)degpos.galactic.lonGLATMedian Galactic latitude (GLAT)degpos.galactic.latfloatAVMedian extinction in the V-band (AV)magphys.absorptionfloatdMedian SED-fitted line-of-sight distance (d)pcpos.distancefloatXMedian X coordinate in heliocentric Cartesian Galactic coordinates (X)pcpos.cartesian.x;stat.medianfloats_XIntrinsic dispersion in the X direction (Sigma_X)pcinstr.dispersionfloatYMedian Y coordinate in heliocentric Cartesian Galactic coordinates (Y)pcpos.cartesian.y;stat.medianfloats_YIntrinsic dispersion in the Y direction (Sigma_Y)pcinstr.dispersionfloatZMedian Z coordinate in heliocentric Cartesian Galactic coordinates (Z)pcpos.cartesian.z;stat.medianfloats_ZIntrinsic dispersion in the Z direction (Sigma_Z)pcinstr.dispersionfloatVlMedian transverse velocity in Galactic longitude (V_l)km/sphys.velocfloats_VlIntrinsic dispersion in transverse velocity in Galactic longitude (Sigma_Vl)km/sstat.errorfloatVbMedian transverse velocity in Galactic latitude (V_b)km/sphys.velocfloats_VbIntrinsic dispersion in transverse velocity in Galactic latitude (Sigma_Vb)km/sstat.errorfloatkappalLinear velocity gradient in Galactic longitude (Kappa_l)km.s**-1.pc**-1arith.grad;phys.velocfloate_kappalError on linear velocity gradient in Galactic longitude (Err_kappa_l)km.s**-1.pc**-1stat.errorfloatAgekinl? Linear kinematic age in Galactic longitude (Age_kin,l)Myrpos.distance;pos.galactic.lonfloatnullablee_Agekinl? Error on linear kinematic age in Galactic longitude (Err_Age_kin,l)Myrstat.errorfloatnullablekappabLinear velocity gradient in Galactic latitude (Kappa_b)km.s**-1.pc**-1arith.grad;phys.velocfloatNBEstimated median number of systems containing a B-type star in the O (N_B)meta.numberfloate_NBLower error on NBP, 16th percentile (N_B_P16)stat.errorintE_NBUpper error on NBP, 84th percentile (N_B_P84)stat.error;stat.maxintMtotEstimated median total stellar initial mass (M_tot)solMassphys.mass;stat.medianfloate_MtotLower error on Mtot, 16th percentile (M_tot_P16)solMassstat.errorintE_MtotUpper error on Mtot, 84th percentile (M_tot_P84)solMassstat.error;stat.maxintAgemaxEstimated maximum isochronal age from the hottest member (Age_max)Myrtime.age;stat.maxfloatNCNumber of crossmatched members with the OCs from Hunt & Reffert (2024, Cat. J/A+A/686/A42 (N_OC)meta.numberintNGNumber of crossmatched members with the stellar groups from Kounkel (N_G)meta.numberintRelGrAgeAge range of the overlapping stellar groups from Kounkel et al. (2020, Cat. J/AJ/160/279) (Related groups age)Myrtime.agecharRelGrCrossmatched groups from Kounkel et al. (2020, Cat. J/AJ/160/279) (Related groups)meta.idcharNameAssigned OB association name (Name)meta.id;meta.maincharANameAlternative name for the OB association (Alternative name)meta.idcharRelOCsAgeAge range of the overlapping OCs from Hunt & Reffert (2024, Cat. J/A+A/686/A42) (Related OCs age)Myrtime.agecharAssSCLSpatially related supercloud from Kormann et al. (2026A&A...706A.161K) (Associated supercloud)meta.idcharJ/MNRAS/549/G853/membersOB members of the OB associationse_pmDEStandard error of pml (pmdec_error)mas/yrstat.error;pos.pm;pos.eq.decdoublepmlMean proper motion in Galactic longitude multiplied by cos(b) (pml)mas/yrpos.pmdoublee_pmlStandard error of pml (pml_error)mas/yrstat.errordoublepmbMean proper motion in Galactic latitude (pmb)mas/yrpos.pmdoublee_pmbStandard error of pmb (pmb_error)mas/yrstat.errordoubleAVMedian extinction in the V-band (AV)magphys.absorptiondouble_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID assigned to the OB association, ordered by increasing median line (ID)meta.idintGaiaDR3? Gaia DR3 source ID (0 if not in Gaia) (GaiaDR3)meta.id;meta.mainnullableHDHenry Draper Number (HD)meta.idcharRA_ICRSRight ascension of star (ICRS) at Ep=2016.0 (RA_ICRS)degpos.eq.ra;meta.maine_RA_ICRSStandard error on right ascension (e_RA_ICRS)degstat.error;pos.eq.radoubleDE_ICRSDeclination of star (ICRS) at Ep=2016.0 (DE_ICRS)degpos.eq.dec;meta.maine_DE_ICRSStandard error on declination (e_DE_ICRS)degstat.error;pos.eq.decdoubleGLONGalactic longitude (GLON)degpos.galactic.lonGLATGalactic latitude (GLAT)degpos.galactic.latdoubleXX coordinate in heliocentric Cartesian Galactic coordinates (X)pcpos.cartesian.x;pos.galactic;pos.heliocentricdoubleYY coordinate in heliocentric Cartesian Galactic coordinates (Y)pcpos.cartesian.y;pos.heliocentric;pos.galacticdoubleZZ coordinate in heliocentric Cartesian Galactic coordinates (Z)pcpos.cartesian.z;pos.heliocentric;pos.galacticdoubleplxCorrected parallax (parallax)maspos.parallax.trigdoublee_plxStandard error on corrected parallax (parallax_error)masstat.error;pos.parallaxdoublepmRAMean proper motion in right ascension multiplied by cos(dec) (pmra)mas/yrpos.pm;pos.eq.radoublee_pmRAStandard error of pmra (pmra_error)mas/yrstat.error;pos.pm;pos.eq.radoublepmDEMean proper motion in declination (pmdec)mas/yrpos.pm;pos.eq.decdoubleMarkerMarker used to plot the OB association members in the paper (marker)meta.codecharColourColour used to plot the OB association members in the paper (colour)meta.codecharNameAssigned OB association name (Name)meta.id.parentcharJ/MNRAS/549/G853/rejectedMembers of the rejected candidate OB associationsDE_ICRSDeclination of star (ICRS) at Ep=2016.0 (DE_ICRS)degpos.eq.dec;meta.maine_DE_ICRSStandard error on declination (e_DE_ICRS)degstat.error;pos.eq.decdoubleGLONGalactic longitude (GLON)degpos.galactic.lon_RA.icrsRight ascension (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.raindexed_DE.icrsDeclination (ICRS) at Epoch=J2000, proper motions taken into accountdegpos.eq.decindexedrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDID assigned to the OB association, ordered from increasing median line-of-sight distance (ID)meta.idintGaiaDR3? Gaia DR3 source ID (0 if not in Gaia) (GaiaDR3)meta.id;meta.mainnullableHDHenry Draper Number (HD)meta.idcharRA_ICRSRight ascension of star (ICRS) at Ep=2016.0 (RA_ICRS)degpos.eq.ra;meta.maine_RA_ICRSStandard error on right ascension (e_RA_ICRS)degstat.error;pos.eq.radoubleGLATGalactic latitude (GLAT)degpos.galactic.latdoubleXX coordinate in heliocentric Cartesian Galactic coordinates (X)pcpos.cartesian.x;pos.galactic;pos.heliocentricdoubleYY coordinate in heliocentric Cartesian Galactic coordinates (Y)pcpos.cartesian.y;pos.galactic;pos.heliocentricdoubleZZ coordinate in heliocentric Cartesian Galactic coordinates (Z)pcpos.cartesian.z;pos.galactic;pos.heliocentricdoubleplxCorrected parallax (parallax)maspos.parallax.trigdoublee_plxStandard error on corrected parallax (parallax_error)masstat.error;pos.parallaxdoublepmRAMean proper motion in right ascension multiplied by cos(dec) (pmra)mas/yrpos.pm;pos.eq.radoublee_pmRAStandard error of pmra (pmra_error)mas/yrstat.error;pos.pm;pos.eq.radoublepmDEMean proper motion in declination (pmdec)mas/yrpos.pm;pos.eq.decdoublee_pmDEStandard error of pml (pmdec_error)mas/yrstat.error;pos.pm;pos.eq.decdoublepmlMean proper motion in Galactic longitude multiplied by cos(b) (pml)mas/yrpos.pmdoublee_pmlStandard error of pml (pml_error)mas/yrstat.errordoublepmbMean proper motion in Galactic latitude (pmb)mas/yrpos.pmdoublee_pmbStandard error of pmb (pmb_error)mas/yrstat.errordouble