+ 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 55 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .395867985128419 1.1615e-07   a 2.101721575511026 3.3879e-08 au q 1.26971729011255 2.3383e-07 au i 25.07050400019739 1.3103e-05 deg node 158.8162187568392 1.447e-05 deg peri 159.0775409258467 8.3268e-05 deg M 146.9061969974157 0.00013731 deg tp 2458546.350525366657 (2019-Mar-03.85052537) 0.00041381 TDB period 1112.91296221411 3.05 2.6909e-05 7.367e-08 d yr n .3234754308942451 7.8214e-09 deg/d Q 2.933725860909503 4.729e-08 au   Orbit Determination Parameters    # obs. used (total)      188      data-arc span      13651 days (37.37 yr)      first obs. used      1982-09-14      last obs. used      2020-01-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58391      source      ORB      producer      Otto Matic      solution date      2020-Jan-30 14:27:45   Additional Information  Earth MOID = .276557 au   Jupiter MOID = 2.49547 au   T_jup = 3.533  [ hide covariance matrix ] Orbital Elements at Epoch 2456871.5 (2014-Aug-02.0) TDB Reference: JPL 55 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .395369240326096 1.1578e-07   q 1.271296624330161 2.3315e-07 au tp 2456320.460095752065 (2013-Jan-27.96009575) 0.00036293 TDB node 158.8486336965512 1.4478e-05 deg peri 159.0160852712857 8.3384e-05 deg i 25.05724059103162 1.3097e-05 deg   Orbit Determination Parameters    # obs. used (total)      188      data-arc span      13651 days (37.37 yr)      first obs. used      1982-09-14      last obs. used      2020-01-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58391      source      ORB      producer      Otto Matic      solution date      2020-Jan-30 14:27:45   Additional Information  Jupiter MOID = 2.49547 au   T_jup = 3.533  Orbit Covariance (6×6)   e q tp node peri i e 1.340470046798655E-14 -2.691925567058051E-14 2.248011553374287E-11 -2.894318265678764E-13 5.605904175892155E-12 1.070289720831815E-13 q -2.691925567058051E-14 5.435856767841954E-14 -4.013262463655748E-11 5.163217976179741E-13 -1.016684071322115E-11 -2.131189889291287E-13 tp 2.248011553374287E-11 -4.013262463655748E-11 1.317200276630734E-7 -1.663881826115338E-9 2.981453551499003E-8 2.797989655930358E-10 node -2.894318265678764E-13 5.163217976179741E-13 -1.663881826115338E-9 2.096147768920393E-10 -5.475588461164514E-10 8.095570048603426E-11 peri 5.605904175892155E-12 -1.016684071322115E-11 2.981453551499003E-8 -5.475588461164514E-10 6.952856938395003E-9 -1.083124300461811E-11 i 1.070289720831815E-13 -2.131189889291287E-13 2.797989655930358E-10 8.095570048603426E-11 -1.083124300461811E-11 1.715351467578556E-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 ] 2020-Sep-21 13:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin