+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160157 (2001 RZ19) Classification: Main-belt Asteroid          SPK-ID: 2160157 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2290365203501156 3.8164e-08   a 3.042197081425028 2.497e-08 au q 2.345422847676162 1.1508e-07 au i 8.654171263291639 5.8084e-06 deg node 170.2478860922827 3.0666e-05 deg peri 108.8944923309726 3.3554e-05 deg M 232.2670297923411 1.4527e-05 deg tp 2459688.169804887156 (2022-Apr-18.66980489) 8.2367e-05 TDB period 1938.114563193115 5.31 2.3862e-05 6.533e-08 d yr n .1857475336271592 2.2869e-09 deg/d Q 3.738971315173894 3.0689e-08 au   Orbit Determination Parameters    # obs. used (total)      318      data-arc span      7212 days (19.75 yr)      first obs. used      2000-05-04      last obs. used      2020-02-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55739      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 13:15:02   Additional Information  Earth MOID = 1.3469 au   Jupiter MOID = 1.54536 au   T_jup = 3.182  [ hide covariance matrix ] Orbital Elements at Epoch 2457278.5 (2015-Sep-13.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .228968525916001 3.825e-08   q 2.347664698686384 1.1523e-07 au tp 2457747.666206535240 (2016-Dec-25.16620654) 7.2466e-05 TDB node 170.2835919516559 3.0666e-05 deg peri 108.4146102692037 3.3531e-05 deg i 8.651411691856337 5.8068e-06 deg   Orbit Determination Parameters    # obs. used (total)      318      data-arc span      7212 days (19.75 yr)      first obs. used      2000-05-04      last obs. used      2020-02-01      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55739      source      ORB      producer      Otto Matic      solution date      2020-Feb-24 13:15:02   Additional Information  Jupiter MOID = 1.54536 au   T_jup = 3.182  Orbit Covariance (6×6)   e q tp node peri i e 1.463025996794468E-15 -4.345685764681983E-15 -2.428756377419854E-13 6.777152462362459E-15 -2.424738216303031E-14 2.46488312539533E-16 q -4.345685764681983E-15 1.327808535451814E-14 1.160620369193939E-12 -3.133312719206955E-14 1.377359501301352E-13 -4.497756273596953E-15 tp -2.428756377419854E-13 1.160620369193939E-12 5.251296604021068E-9 -4.388514124272344E-12 1.001774200102173E-9 2.357230309349861E-12 node 6.777152462362459E-15 -3.133312719206955E-14 -4.388514124272344E-12 9.403853584345002E-10 -9.299242827829268E-10 3.929614232789408E-11 peri -2.424738216303031E-14 1.377359501301352E-13 1.001774200102173E-9 -9.299242827829268E-10 1.124354375955786E-9 -3.830505741020871E-11 i 2.46488312539533E-16 -4.497756273596953E-15 2.357230309349861E-12 3.929614232789408E-11 -3.830505741020871E-11 3.37191684522261E-11 [ 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 15.6   n/a MPO426991   160157 (2001 RZ19)          Discovered 2001-Sep-07 by LINEAR at Socorro Reference: 20070730/Numbers.arc Last Updated: 2007-08-06 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Nov-30 00:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin