+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   31180 (1997 YX3) Classification: Mars-crossing Asteroid          SPK-ID: 2031180 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4233541306996629 8.2452e-08   a 2.779506561170733 3.0526e-08 AU q 1.602790977192288 2.244e-07 AU i 27.96270480945945 2.5341e-05 deg node 298.7257677219338 2.0285e-05 deg peri 86.1017346602957 3.3874e-05 deg M 151.5725428920247 2.2154e-05 deg tp 2455687.863572606328 (2011-May-06.36357261) 9.8638e-05 JED period 1692.583029661772 4.63 2.7883e-05 7.634e-08 d yr n .2126926677694143 3.5039e-09 deg/d Q 3.956222145149179 4.345e-08 AU   Orbit Determination Parameters    # obs. used (total)      336      data-arc span      10683 days (29.25 yr)      first obs. used      1984-01-05      last obs. used      2013-04-05      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .67419      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 14:57:10   Additional Information  Earth MOID = .839658 AU   T_jup = 3.042  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.1 mag n/a PDS3 (MPO 18671)   rotation period rot_per 15.6 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Warner, B.D. (2007) Minor Planet Bul. 34, 32-37.] 31180 (1997 YX3)          Discovered 1997-Dec-22 by BAO Schmidt CCD Asteroid Program at Xinglong (327) Reference: 20011130/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1997 YX3 = 1984 AD  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 11:35 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin