+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 66 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3959257109344975 1.14e-07   a 2.101645379864325 3.1957e-08 au q 1.26954993870934 2.3038e-07 au i 25.07347522911926 1.2991e-05 deg node 158.8131076903992 1.2436e-05 deg peri 159.0937426729713 7.8774e-05 deg M 211.5742063791426 0.00013207 deg tp 2459659.322241177185 (2022-Mar-20.82224118) 0.00041843 TDB period 1112.85244157573 3.05 2.5382e-05 6.949e-08 d yr n .3234930225702361 7.3783e-09 deg/d Q 2.933740821019311 4.4609e-08 au   Orbit Determination Parameters    # obs. used (total)      222      data-arc span      14084 days (38.56 yr)      first obs. used      1982-09-14      last obs. used      2021-04-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .58738      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 14:55:01   Additional Information  Earth MOID = .274532 au   Jupiter MOID = 2.49576 au   T_jup = 3.533  [ hide covariance matrix ] Orbital Elements at Epoch 2457427.5 (2016-Feb-09.0) TDB Reference: JPL 66 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3959789980785574 1.1439e-07   q 1.269252490386432 2.3134e-07 au tp 2457434.050560625659 (2016-Feb-15.55056063) 0.00036971 TDB node 158.8439278828186 1.2434e-05 deg peri 159.1093885891681 7.8814e-05 deg i 25.07494797939558 1.2993e-05 deg   Orbit Determination Parameters    # obs. used (total)      222      data-arc span      14084 days (38.56 yr)      first obs. used      1982-09-14      last obs. used      2021-04-06      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .58738      source      ORB      producer      Otto Matic      solution date      2021-Apr-12 14:55:01   Additional Information  Jupiter MOID = 2.49576 au   T_jup = 3.533  Orbit Covariance (6×6)   e q tp node peri i e 1.308467478718426E-14 -2.639768138019114E-14 2.195185270203854E-11 -2.139991975870121E-13 5.128648807948482E-12 1.337747511290473E-13 q -2.639768138019114E-14 5.35159760238111E-14 -3.944387497985204E-11 3.855926541025932E-13 -9.371564948619361E-12 -2.61079167635027E-13 tp 2.195185270203854E-11 -3.944387497985204E-11 1.366821296187337E-7 -1.310756149041114E-9 2.875993972252723E-8 4.377989689928464E-10 node -2.139991975870121E-13 3.855926541025932E-13 -1.310756149041114E-9 1.545955710591142E-10 -4.041736749507254E-10 7.013587632550558E-11 peri 5.128648807948482E-12 -9.371564948619361E-12 2.875993972252723E-8 -4.041736749507254E-10 6.211702868384939E-9 2.796582491022661E-11 i 1.337747511290473E-13 -2.61079167635027E-13 4.377989689928464E-10 7.013587632550558E-11 2.796582491022661E-11 1.688260281562813E-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 16.55   n/a MPCxxxxx   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-May-08 19:36 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin