+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   161995 (1983 LB) Classification: Amor [NEO]          SPK-ID: 2161995 [ 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 .4790202243000166 8.497e-08   a 2.286759077189374 1.2894e-08 au q 1.191355231114021 1.9808e-07 au i 25.27209061386398 1.5566e-05 deg node 81.18816653491167 2.5576e-05 deg peri 220.6827653690999 4.6422e-05 deg M 232.95897916305 4.0189e-05 deg tp 2459446.228617616274 (2021-Aug-19.72861762) 0.00014416 TDB period 1263.074724090913 3.46 1.0683e-05 2.925e-08 d yr n .2850187666126459 2.4107e-09 deg/d Q 3.382162923264727 1.9071e-08 au   Orbit Determination Parameters    # obs. used (total)      137      data-arc span      12991 days (35.57 yr)      first obs. used      1983-06-13      last obs. used      2019-01-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .70671      source      ORB      producer      Otto Matic      solution date      2019-Jan-26 10:13:01   Additional Information  Earth MOID = .245614 au   Jupiter MOID = 2.06566 au   T_jup = 3.328  [ hide covariance matrix ] Orbital Elements at Epoch 2456973.5 (2014-Nov-12.0) TDB Reference: JPL 55 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4793046559957348 8.4547e-08   q 1.190455006959915 1.971e-07 au tp 2456920.478489304984 (2014-Sep-19.97848930) 0.00012649 TDB node 81.23514779681081 2.5573e-05 deg peri 220.6827168525482 4.6402e-05 deg i 25.27754026506393 1.5566e-05 deg   Orbit Determination Parameters    # obs. used (total)      137      data-arc span      12991 days (35.57 yr)      first obs. used      1983-06-13      last obs. used      2019-01-06      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .70671      source      ORB      producer      Otto Matic      solution date      2019-Jan-26 10:13:01   Additional Information  Jupiter MOID = 2.06566 au   T_jup = 3.328  Orbit Covariance (6×6)   e q tp node peri i e 7.148232593910612E-15 -1.665781302683673E-14 -7.836890261706407E-12 4.529891066585488E-13 -2.300409979878071E-12 -4.240826912239926E-13 q -1.665781302683673E-14 3.884949409146379E-14 1.858626491582175E-11 -1.077512870386677E-12 5.470074241301135E-12 1.009809591461578E-12 tp -7.836890261706407E-12 1.858626491582175E-11 1.599891207416194E-8 -9.197023426622389E-10 5.073341809111523E-9 8.952187988588956E-10 node 4.529891066585488E-13 -1.077512870386677E-12 -9.197023426622389E-10 6.539772563814315E-10 -8.313951774435962E-10 -2.648815940178646E-10 peri -2.300409979878071E-12 5.470074241301135E-12 5.073341809111523E-9 -8.313951774435962E-10 2.153120166274436E-9 4.76071290665836E-10 i -4.240826912239926E-13 1.009809591461578E-12 8.952187988588956E-10 -2.648815940178646E-10 4.76071290665836E-10 2.422936023948387E-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 17.2   n/a MPO299862   161995 (1983 LB)          Discovered 1983-Jun-13 by Swann, S. R., Helin, E. F. at Palomar Reference: 20070926/Numbers.arc Last Updated: 2007-09-30 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 08:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin