J/ApJS/239/4ivo://CDS.VizieR/J/ApJS/239/4doi:10.26093/cds/vizier.22390004CDSThirouin A.Moskovitz N.A.Binzel R.P.Christensen E.J.DeMeo F.E.,Person M.J.Polishook D.Thomas C.A.Trilling D.Willman M.C.Burt B.,Hinkle M.L.Pugh T.2019-01-28T05:58:28Z2019-01-25T14:07:14ZCDS support team

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

cds-question@unistra.frasteroidsphotometryOver 4.5 years, the Mission Accessible Near-Earth Object Survey assembled 228 near-Earth object (NEO) light curves. We report rotational light curves for 82 NEOs, constraints on amplitudes and periods for 21 NEOs, light curves with no detected variability within the image signal-to-noise and length of our observing block for 30 NEOs, and 10 tumblers. We uncovered two ultra-rapid rotators with periods below 20s,--2016 MA with a potential rotational periodicity of 18.4s, and 2017 QG18 rotating in 11.9s--and estimated the fraction of fast/ultra-rapid rotators undetected in our project plus the percentage of NEOs with a moderate/long periodicity undetectable during our typical observing blocks. We summarize the findings of a simple model of synthetic NEOs to infer the object's morphology distribution using the measured distribution of light curve amplitudes. This model suggests that a uniform distribution of axis ratio can reproduce the observed sample. This suggests that the quantity of spherical NEOs (e.g., Bennu) is almost equivalent to the quantity of highly elongated objects (e.g., Itokawa), a result that can be directly tested thanks to shape models from Doppler delay radar imaging analysis. Finally, we fully characterized two NEOs-2013 YS2 and 2014 FA7-as appropriate targets for a potential robotic/human mission due to their moderate spin periods and low {Delta}v.2018ApJS..239....4Thttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/239/4CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/A+A/375/285 : Photometric observations of 9 Near-Earth Objects (Szabo+, 2001)J/A+A/509/A94 : Lightcurves of 14 NEAs (Kwiatkowski+, 2010)J/A+A/511/A49 : Lightcurves of 12 NEAs (Kwiatkowski+, 2010)J/ApJ/743/156 : NEOWISE obs. of NEOs: preliminary results (Mainzer+, 2011)J/ApJ/760/L12 : WISE/NEOWISE NEOs preliminary thermal fits (Mainzer+, 2012)J/AJ/152/163 : Mission Accessible Near-Earth Objects Survey (Thirouin+, 2016)J/AJ/154/168 : NEOWISE: thermal model fits for NEOs and MBAs (Masiero+, 2017)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/239/4https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/239/4http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/239/4https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/239/4https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/239/4http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/239/4GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJS/239/4/table1Observing log and resultsl_ProtLimit flag on Protmeta.code.errorcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSet[1/6] Subset (1)meta.noteintNameNEO designationmeta.id;meta.maincharf_Name[bct] Source flag (2)meta.codecharDateUT observation datetime.epoch;obsnullableDate2Other days of observations if anydtime.epochcharNimg[9/398] Number of imagesmeta.numberintrhDistance, sun-object or range during observationaupos.distancecharDeltaDistance, earth-object or range during observationaupos.distancecharalphaPhase angle or range during observationdegpos.phaseAngcharFiltFilter (V, VR, r' or wh; Thirouin+ 2016, J/AJ/152/163)pos.cartesian.ycharTelTelescope (CTIO, DCT, KP2, KP4 or SOAR; see the "Description" section above)meta.id;instr.telcharDelTDuration(s) of observing block(s) ({Delta}T)mintime.duration;meta.tablechartexpExposure time(s)stime.duration;obs.exposurecharProt[0.003/3]? Rotational period, hourshtime.perioddoublenullablel_DelmLimit flag on dmmeta.code.errorcharDelm[0.05/2.8]? Amplitude ({Delta}m)magphot.magfloatnullablee_Delm[0.02/0.07]? Uncertainty in Delmmagstat.errorfloatnullableJDJulian date of zero phase, JD-2450000dtime.epochdoubleHmag[18.6/29.6] Absolute H magnitudemagphys.magAbsfloatDiam[3/566] Estimated NEO diameter with albedo=20%mphys.sizeintClassDynamical Class ("Amor", "Apollo" or "Aten")meta.idcharDelV1[3.8/11.6]? Velocity change, Shoemaker & Helin (1978rpgp.rept...20S) (3)km/sphys.veloc;arith.difffloatnullableDelV2[4/12]? Velocity change, Near-Earth Object Human Space Flight Accessible Targets Study (3)km/sphys.veloc;arith.difffloatnullableOrbitDisplay the orbital data from Bowell+ 2014 (B/astorb)meta.ref.urlcharMPCShow the data from the Minor Planet Center (MPC)meta.ref.urlchar