J/A+A/556/A8ivo://CDS.VizieR/J/A+A/556/A8doi:10.26093/cds/vizier.35560008CDSLhotka C.Souchay J.Shahsavari A.2014-02-02T22:23:08Z2013-07-24T07:34:54ZCDS support team

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

cds-question@unistra.frasteroidsWe compute for a set of 100 asteroids their rotational parameters: the moments of inertia along the principal axes of the object, the obliquity of the axis of rotation with respect to the orbital plane, the precession rates, and the nutation coefficients. We select 100 asteroids for which the parameters for the study are well-known from observations or space missions. For each asteroid, we determine the moments of inertia, assuming an ellipsoidal shape. We calculate their obliquity from their orbit (instead of the ecliptic) and the orientation of the spin-pole. Finally, we calculate the precession rates and the largest nutation components. The number of asteroids concerned leads to some statistical studies of the output. We provide a table of rotational parameters for our set of asteroids. The table includes the obliquity, their axes ratio, their dynamical ellipticity H_d_, and the scaling factor K. We compute the precession rate {psi} and the leading nutation coefficients {Delta}{psi} and {Delta}{epsilon}. We observe similar characteristics, as observed by previous authors that is, a significantly larger number of asteroids rotates in the prograde mode (~60%) than in the retrograde one with a bimodal distribution. In particular, there is a deficiency of objects with a polar axis close to the orbit. The precession rates have a mean absolute value of 18"/y, and the leading nutation coefficients have an average absolute amplitude of 5.7" for {Delta}{psi} and 5.2" for {Delta}{epsilon}. At last, we identify and characterize some cases with large precession rates, as seen in 25143 Itokawa, with has a precession rate of about - 475"/y.2013A&A...556A...8Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/556/A8CatalogResearchIsServedByTAP VizieR generic servicerelated-toB/astorb : Orbits of Minor Planets (Bowell+ 2013)I/245 : Orbital Elements of Minor Planets 1998 (Batrakov+ 1997)http://sbn.psi.edu/pds/ : PDS page [1]http://astro.troja.mff.cuni.cz/projects/asteroids3D/web.php : DAMIT page [2]http://www.minorplanetcenter.net/ : MPC page [3]http://www.wolframalpha.com/ : WCD page [4]https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/556/A8https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/556/A8http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/556/A8https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/556/A8https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/556/A8http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/556/A8GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/556/A8/asteroidsThe set of 100 asteroids: orbital and physical parameters (table1), and rotations (table2)psiPrecession rate d{psi}/dtarcsec/yrpos.precessfloatrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeq[1/25143] IAU asteroid designation numbermeta.id;meta.mainintNameAsteroid Namemeta.id;meta.maincharM/C[0.1/1]? Mass (in m[Ceres]) from [1] (1)phys.massfloatnullableRad[0.16/476.2] Radius from [4]kmphys.size.radiusfloata/b[1/3.1]? Ratio of semi-axes a/b from [1]phys.size.axisRatiofloatnullableb/c[1/1.8]? Ratio of semi-axes b/c from [1]phys.size.axisRatiofloatnullableno[0/2] Number of further solutions for c, a/b, b/c from [2]meta.numberintc[15.2/260.6]? Semi-axis c from [2]kmphys.size.diameterfloatnullablea/b2[1/1.32]? Ratio of semi-axes a/b from [2]phys.size.axisRatiofloatnullableb/c2[1/2]? Ratio of semi-axes b/c from [2]phys.size.axisRatiofloatnullablec2[19.1/240.3]? Second semi-axis c from [2]phys.size.diameterfloatnullablea/b3[1/1.3]? Second ratio of semi-axes a/b from [2]phys.size.axisRatiofloatnullableb/c3[1/2]? Second ratio of semi-axes b/c from [2]phys.size.axisRatiofloatnullableTrot[2.87/35.5] Rotation period of the asteroid from [2]htime.perioddoublelambda[9,340]? Ecliptic longitude {lambda} from [1]degpos.ecliptic.lonintnullablebeta[-88,58]? Ecliptic latitude {beta} from [1]degpos.ecliptic.latintnullableeps[26,170]? Obliquity {epsilon} from [1]degsrc.orbital.inclinationintnullableno2[1/2]? Number of further solutions for lambda, beta, eps from [2] (2)meta.numberintnullablelam2[4,360]? Ecliptic longitude from [2]degpos.ecliptic.lonintnullablebeta2[-88,74]? Ecliptic latitude from [2]degpos.ecliptic.latintnullableeps2[9,168]? Obliquity {epsilon} from [2]degsrc.orbital.inclinationintnullablelam3[89,365]? Second ecliptic longitude from [2]degpos.ecliptic.lonintnullablebeta3[-84,74]? Second ecliptic latitude from [2]degpos.ecliptic.latintnullableeps3[20,555]? Second obliquity from [2]degsrc.orbital.inclinationintnullableTrev[1.52/11.96] Revolution periodyrtime.perioddoubleOa[1.3/5.3] Semi-major orbital axisAUphys.size.smajAxisdoublee[0.003/0.325] Orbital eccentrictysrc.orbital.eccentricitydoublei[0/35] Inclinationdegsrc.orbital.inclinationfloatomega[0/360] Argument of pericenter {omega}degsrc.orbitaldoubleOmega[0/360] Longitude of ascending node {Omega}degsrc.orbital.nodedoubleM[07/360] Mean anomaly (M)degsrc.orbital.meanAnomalydoublen[0.08/0.65] Mean motion (in deg per day) (n)deg/dpos.ephemdoubleorbDisplay the orbital data from Bowell et al. (Cat. B/astorb)meta.ref.urlcharRem[+*] switched elliposidal dimensions (3)meta.codecharHd[0/0.43] Dynamical ellipticitysrc.ellipticityfloatK[0/881.2] Scaling factorarcsec/yrarith.factorfloatdpsi1[0/42] Longitudinal nutation coefficient 1 {Delta}{psi}arcsecpos.eop.nutationfloatdpsi2[0/94] Longitudinal nutation coefficient 2 {Delta}{psi}arcsecpos.eop.nutationfloatdeps[0/31] Latitudinal nutation coefficient {Delta}{epsilon}arcsecpos.eop.nutationfloat