+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   3271 Ul (1982 RB) Classification: Amor [NEO]          SPK-ID: 2003271 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 56 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3958679905578755 1.1545e-07   a 2.101721574837919 3.3365e-08 au q 1.269717278294699 2.3266e-07 au i 25.07050320069282 1.3037e-05 deg node 158.8162171124268 1.3938e-05 deg peri 159.0775475968039 8.1532e-05 deg M 146.9061921165789 0.00013526 deg tp 2458546.350540673569 (2019-Mar-03.85054067) 0.00040764 TDB period 1112.91296167947 3.05 2.6502e-05 7.256e-08 d yr n .3234754310496417 7.7029e-09 deg/d Q 2.93372587138114 4.6574e-08 au   Orbit Determination Parameters    # obs. used (total)      191      data-arc span      14005 days (38.34 yr)      first obs. used      1982-09-14      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .601      source      ORB      producer      Otto Matic      solution date      2021-Jan-18 06:07:42   Additional Information  Earth MOID = .276557 au   Jupiter MOID = 2.49547 au   T_jup = 3.533  [ hide covariance matrix ] Orbital Elements at Epoch 2456981.5 (2014-Nov-20.0) TDB Reference: JPL 56 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3956160408179989 1.154e-07   q 1.270509014572791 2.326e-07 au tp 2457434.066392320509 (2016-Feb-15.56639232) 0.00038268 TDB node 158.8421777772432 1.3936e-05 deg peri 159.0496077615709 8.1572e-05 deg i 25.06811774858668 1.3036e-05 deg   Orbit Determination Parameters    # obs. used (total)      191      data-arc span      14005 days (38.34 yr)      first obs. used      1982-09-14      last obs. used      2021-01-17      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .601      source      ORB      producer      Otto Matic      solution date      2021-Jan-18 06:07:42   Additional Information  Jupiter MOID = 2.49547 au   T_jup = 3.533  Orbit Covariance (6×6)   e q tp node peri i e 1.331686894052983E-14 -2.676884506147738E-14 2.345329022553512E-11 -2.423429442380394E-13 5.425689625695656E-12 1.231842339096588E-13 q -2.676884506147738E-14 5.410161004057994E-14 -4.186921633765064E-11 4.317987464229461E-13 -9.848496725183556E-12 -2.414434976716961E-13 tp 2.345329022553512E-11 -4.186921633765064E-11 1.464464382269944E-7 -1.521332693872095E-9 3.075771227322661E-8 3.819705099526667E-10 node -2.423429442380394E-13 4.317987464229461E-13 -1.521332693872095E-9 1.941991203674502E-10 -4.804374091080199E-10 7.58660972969222E-11 peri 5.425689625695656E-12 -9.848496725183556E-12 3.075771227322661E-8 -4.804374091080199E-10 6.654019068312921E-9 1.117280024721522E-11 i 1.231842339096588E-13 -2.414434976716961E-13 3.819705099526667E-10 7.58660972969222E-11 1.117280024721522E-11 1.699314144166361E-10 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.4   n/a MPO435729   3271 Ul (1982 RB)          Discovered 1982-Sep-14 by Schuster, H.-E. at La Silla Reference: DISCOVERY.DB Last Updated: 2003-08-29 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-23 01:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin