J/AJ/157/139ivo://CDS.VizieR/J/AJ/157/139doi:10.26093/cds/vizier.51570139CDSSheppard S.S.Trujillo C.A.Tholen D.J.Kaib N.2019-11-04T14:51:20Z2019-08-02T09:02:36ZCDS support team

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

cds-question@unistra.frsolar-systemasteroidsapparent-magnitudeInner Oort cloud objects (IOCs) are trans-Plutonian for their entire orbits. They are beyond the strong gravitational influences of the known planets, yet close enough to the Sun that outside forces are minimal. Here we report the discovery of the third known IOC after Sedna and 2012 VP113, called 2015 TG387. This object has a perihelion of 65+/-1 au and semimajor axis of 1170+/-70 au. The longitude of perihelion angle, {omega}, for 2015 TG387 is between that of Sedna and 2012 VP113 and thus similar to the main group of clustered extreme trans-Neptunian objects (ETNOs), which may be shepherded into similar orbital angles by an unknown massive distant planet called Planet X, or Planet Nine. The orbit of 2015 TG387 is stable over the age of the solar system from the known planets and Galactic tide. When including outside stellar encounters over 4 Gyr, 2015 TG387's orbit is usually stable, but its dynamical evolution depends on the stellar encounter scenarios used. Surprisingly, when including a massive Planet X beyond a few hundred au on an eccentric orbit that is antialigned in longitude of perihelion with most of the known ETNOs, we find that 2015 TG387 is typically stable for Planet X orbits that render the other ETNOs stable as well. Notably, 2015 TG387's argument of perihelion is constrained, and its longitude of perihelion librates about 180{deg} from Planet X's longitude of perihelion, keeping 2015 TG387 antialigned with Planet X over the age of the solar system.2019AJ....157..139Shttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/157/139CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toJ/AJ/152/221 : New extreme trans-Neptunian objects (Sheppard+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/157/139https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/157/139http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/157/139https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/157/139https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/157/139http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/157/139GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/AJ/157/139/table1 (Further inner Oort cloud survey observations)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/157/139/table1?https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/157/139/table1?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/157/139/table1?GETtext/xml+votable180.050000true162.8291711.60.0055555555555555565/5778 5784 9115 6/324 333 334 336 366 370 449 525 528 532 537 543 549 550 561 567 575 577 580 584 588 601 602 612 617 623 626 628 645 660 667 669 675 676 687 690 710 738 2048 2052 2056 2060 2065 2066 4445 4477 4564 4565 4569 4579 4581 4587 4589 4592 4599 4606 4792 4796 4819 4821 4830 4835 4837 4842 4849 4850 4892 4901 4908 4913 4921 4930 4934 4938 4942 4947 4952 4962 4995 4997 4998 5000 5129 5152 5183 5192 5197 5216 5263 5276 5284 5290 6149 6165 8217 8227 8232 8238 8249 8323 8325 8329 8335 8337 8338 8341 8353 8359 16470 16471 16477 16478 16502 16505 16511 16554 16569 16619 16650 16674 16681 16780 16793 16818 16823 16826 16831 16913 17037 17054 17057 17062 18415 18419 18427 18433 19011 19015 19017 19018 19021 19043 19563 19575 19579 19623 19631 19653 19660 19726 19738 19740 19748 19752 19783 19785 19786 19798 19988 22519 22522 22523 22526 22671 22757 22763 22764 22777 22783 22975 23026 23071 23093 23104 23118 23121 23140 23141 23142 23145 23324 23348 23349 23368 23373 23378 23381 23520 23548 23718 23719 23721 23736 23889 24064 25905 25911 25912 25930 25947 25955 25956 25963 25965 26000 26012 26038 26042 26045 26046 26054 26056 26069 26073 26077 26081 26105 26108 26111 26229 26230 26235 26239 26286 26297 26323 26365 26371 26373 26385 26390 26404 26405 26410 26421 26427 26429 26432 26437 26439 26441 26447 26449 26468 26473 26503 26507 26511 26515 26517 26528 26534 26539 26767 26776 26780 26787 26804 26809 26813 26820 26825 26826 26843 26849 26850 26859 26876 26879 26974 26986 26992 26998 27001 27006 27061 27062 27070 27072 27080 27090 27105 27113 27207 27216 27227 27245 27250 27398 27405 27409 27431 27434 27436 27447 27479 27483 27486 27493 27501 27507 27670 27697 27705 27706 27714 27761 27797 27801 27813 27817 27837 27843 27852 27882 27905 28181 28187 28188 28218 28226 28302 29781 29815 29823 29953 29955 29956 29963 29964 29972 29973 29984 30020 31203 31248 31254 31262 31285 31291 31293 31296 31304 31329 31380 31381 31390 35791 35799 35800 35801 35802 35807 35824 35828 36083 36091 36095 36267 36403 36404 36406 36415 36419 36427 36431 36436 36440 36444 36448 36449 36452 36454 36456 36459 36465 36467 36469 36472 36477 36478 36483 36491 36492 36495 36499 36503 36504 36508 36515 36519 36528 36532 36545 36548 36553 36554 36555 36557 36561 36562 36563 36564 36565 36566 36569 36574 36581 36582 36587 36593 36600 36610 36611 36618 36621 36622 36633 36640 36646 36656 36657 36658 36663 36666 36668 36737 36743 36744 36746 36748 36751 36755 36756 36763 36789 36808 40436 43387 43470 43475 43804 43836 43878 43881 43898 43921 43929 43951 43952 43955 44016 46847 46923 46927 46932 46937 46944 46950 46952 46962 47017 47020 47026 47034 47614 47943 47964 47985 48179 48190 48209 48215 48222 48229 48235 48237 48240 48243 48246 48249 48261 48275 48277 48286 48296 48300 48304 48326 48338 48341 48357 48385 48388 48391 48393 48394 48409 48418 48422 48430 48432 48437 48444 48486 48488 48495 48528 48538 48579 48642 48647 48657 48665 48894 49058 49059 49066 49069 49070 49075 49080 49085 49086 49087 49100 49112 49120 49146 49148https://cdsarc.cds.unistra.fr/viz-bin/moc/J/AJ/157/139?format=asciidefaultJ/AJ/157/139/table1Further inner Oort cloud survey observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintDate1First UT observation datetime.epoch;obsnullableDate2Last UT observation datetime.epoch;obsnullableTelTelescope (1)meta.id;instr.telcharb_T[1.5/72] Approximate time between first & last field images, lower valuehtime.interval;stat.minfloatB_T[3/96]? Approximate time between first & last field images, upper valuehtime.interval;stat.maxintnullableb_theta[0.45/1.3] Range of seeing for the night {theta}, lower valuearcsecinstr.obsty.seeing;stat.minfloatB_theta[0.6/1.6] Range of seeing for the night {theta}, upper valuearcsecinstr.obsty.seeing;stat.maxfloatrlim[24/25.9] Limiting magnitude in r band (2)magphot.magfloatArea[4.5/200] Area covered during the nightdeg**2phys.areafloatFieldField identifier (3)meta.id;obs.fieldcharRAJ2000Hour of Right Ascension (J2000)pos.eq.ra;meta.mainDEJ2000Degree of Declination (J2000)pos.eq.dec;meta.main