J/A+A/522/A93ivo://CDS.VizieR/J/A+A/522/A93doi:10.26093/cds/vizier.35220093CDSThirouin A.Ortiz J.L.Duffard R.Santos-Sanz P.Aceituno F.J.,Morales N.2010-12-18T15:45:58Z2010-11-05T09:57:19ZCDS support team

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

cds-question@unistra.frasteroidsphotometryWe present results of 6 years of observations, reduced and analyzed with the same tools in a systematic way. We present completely new data on 15 objects (1998SG35, 2002GB10, 2003EL61, 2003FY128, 2003MW12, 2003OP32, 2003WL7, 2004SB60, 2004UX10, 2005CB79, 2005RM43, 2005RN43, 2005RR43, 2005UJ438, 2007UL126 (or 2002KY14)), for 5 objects we present a new analysis of previously published results plus additional data (2000WR106, 2002CR46, 2002TX300, 2002VE95, 2005FY9) and for 9 objects we present a new analysis of data already published (1996TL66, 1999TZ1, 2001YH140, 2002AW197, 2002LM60, 2003AZ84, 2003CO1, 2003VS2, 2004DW). Lightcurves, possible rotation periods and photometric amplitudes are reported for all of them. The photometric variability is smaller than previously thought: the mean amplitude of our sample is 0.1mag and only around 15% of our sample has a larger variability than 0.15mag. The smaller variability than previously thought seems to be a bias of previous observations. We find a very weak trend of faster spinning objects towards smaller sizes, which appears to be consistent with the fact that the smaller objects are more collisionally evolved, but could also be a specific feature of the Centaurs, the smallest objects in our sample.We also find that the smaller the objects, the larger their amplitude, which is also consistent with the idea that small objects are more collisionally evolved and thus more deformed. Average rotation rates from our work are 7.5h for the whole sample, 7.6h for the TNOs alone and 7.3h for the Centaurs. All of them appear to be somewhat faster than what one can derive from a compilation of the scientific literature and our own results. Maxwellian fits to the rotation rate distribution give mean values of 7.5h (for the whole sample) and 7.3h (for the TNOs only). Assuming hydrostatic equilibrium we can determine densities from our sample under the additional assumption that the lightcurves are dominated by shape effects, which is likely no realistic. The resulting average density is 0.92g/cm^3^ which is not far from the density constraint that one can derive from the apparent spin barrier that we observe.2010A&A...522A..93Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/522/A93CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/astorb : Orbits of Minor Planets (Bowell+ 2010)J/A+A/468/L13 : Photometry of the trans-Neptunian object 2005FY9 (Ortiz+, 2007)J/AJ/133/26 : Solar phase curves of distant icy bodies (Rabinowitz+, 2007)J/A+A/508/451 : Light curves of 5 Trans-Neptunian Objects (Perna+, 2009)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/522/A93https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/522/A93http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/522/A93https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/522/A93https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/522/A93http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/522/A93GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapOpticaldefaultJ/A+A/522/A93/listList of studied objectsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanet? Planet number, if assigned (G1)meta.id;meta.mainintnullableNamePlanet name \linkRole{Observations of this asteroid } (G1)meta.id;meta.maincharprimaryH? Absolute magnitude H parametermagphys.magAbsfloatnullablei? Orbit inclinationdegsrc.orbital.inclinationdoublenullablee? Orbit eccentricitysrc.orbital.eccentricitydoublenullablea? Orbit semimajor axisAUphys.size.smajAxisdoublenullableLCPlot of the light curvemeta.ref.urlcharastorbDetails from the Astorb database (Cat. B/astorb)meta.ref.urlcharJ/A+A/522/A93/table1Dates, geometric and photometric data of the observationsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanet? Planet number, if assigned (G1)meta.id;meta.mainintnullableNamePlanet name (G1)meta.idcharDateObservation datetime.epoch;obsnullableNimgNumber of imagesmeta.numberintrhTopocentric distanceAUpos.distancefloatdeltaHeliocentric distanceAUpos.distance;pos.heliocentricfloatphiPhase angledegsrc.orbitalfloatFilt[R] Filter usedinstr.setup;instr.filtercharTelTelescope: Calar Alto, INT or OSN (1)instr.telcharJ/A+A/522/A93/table3Photometric resultsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintPlanet? Planet number, if assigned (G1)meta.id;meta.mainintnullableNamePlanet name (G1)meta.idcharn_JD[*] * for the date of the image in which we performed a crude absolute calibrationmeta.notecharJDJulian date, not corrected for travel timedtime.epochdoublerelmagRelative magnitudemagphot.mag;arith.difffloate_relmag1-{sigma} error associated to relmagmagstat.error;phot.magfloatRmagR magnitudemagphot.mag;em.opt.RfloatFilterFilter used during observational runs (Clear or R)instr.setup;instr.filtercharphiPhase angledegsrc.orbitalfloatrhTopocentric distanceAUpos.distancefloatdeltaHeliocentric distanceAUpos.distance;pos.heliocentricfloatmR(1,1)Magnitude at 1AU from the Earth and at 1AU from the Sunmagphot.mag;em.opt.Rfloat