J/AJ/151/117ivo://CDS.VizieR/J/AJ/151/117doi:10.26093/cds/vizier.51510117CDSPal A.Kiss C.Muller T.G.Molnar L.Szabo R.Szabo G.M.,Sarneczky K.Kiss L.L.2017-06-19T07:57:08Z2016-07-20T07:06:52ZCDS support team

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

cds-question@unistra.frsolar-system-planetsinfrared-photometryvisible-astronomyphotometryWe present the first comprehensive thermal and rotational analysis of the second most distant trans-Neptunian object (TNOs) (225088)2007OR_10_. We combined optical light curves provided by the Kepler Space Telescope-K2 extended mission and thermal infrared data provided by the Herschel Space Observatory. We found that (225088)2007OR_10_ is likely to be larger and darker than derived by earlier studies: we obtained a diameter of d=1535_-225_^+75^km which places (225088) 2007OR_10_ in the biggest top three TNOs. The corresponding visual geometric albedo is p_V_=0.089_-0.009_^+0.031^. The light-curve analysis revealed a slow rotation rate of P_rot_=44.81+/-0.37hr, superseded by very few objects. The most likely light-curve solution is double-peaked with a slight asymmetry; however, we cannot safely rule out the possibility of having a rotation period of P_rot_=22.40+/-0.18hr, which corresponds to a single-peaked solution. Due to the size and slow rotation, the shape of the object should be a MacLaurin ellipsoid, so the light variation should be caused by surface inhomogeneities. Its newly derived larger diameter also implies larger surface gravity and a more likely retention of volatiles--CH_4_, CO, and N_2_--on the surface.2016AJ....151..117Phttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/151/117CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/astorb : Orbits of Minor Planets (Bowell+ 2014)I/284 : The USNO-B1.0 Catalog (Monet+ 2003)J/AJ/134/787 : Light curves of dwarf plutonian planets (Sheppard, 2007)http://archive.stsci.edu/k2/ : MAST K2https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/151/117https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/151/117http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/151/117https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AJ/151/117https://vizier.iucaa.in/viz-bin/votable?-source=J/AJ/151/117http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/AJ/151/117GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapInfraredOpticaldefaultJ/AJ/151/117/table1Photometric data of 2007 OR_10_recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintJDJulian Date of the observationdtime.epochdoublemag[20.8/21.6] Transformed USNO-B1.0 R system magnitude (1)magphot.mag;em.opt.Rfloate_mag[0.037/0.191] Uncertainty in magmagstat.error;phot.magfloat