+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2290403290808052 3.7776e-08   a 3.041660716860521 2.4599e-08 au q 2.34499774531863 1.143e-07 au i 8.655463747578436 5.8035e-06 deg node 170.2439462027195 3.0217e-05 deg peri 108.9486085611 3.3137e-05 deg M 269.3572880228942 1.4729e-05 deg tp 2459688.359729127484 (2022-Apr-18.85972913) 8.2252e-05 TDB period 1937.602027289894 5.30 2.3505e-05 6.435e-08 d yr n .185796667700399 2.2539e-09 deg/d Q 3.738323688402413 3.0233e-08 au   Orbit Determination Parameters    # obs. used (total)      321      data-arc span      7562 days (20.70 yr)      first obs. used      2000-05-04      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55521      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:46:11   Additional Information  Earth MOID = 1.34463 au   Jupiter MOID = 1.54545 au   T_jup = 3.182  [ hide covariance matrix ] Orbital Elements at Epoch 2457324.5 (2015-Oct-29.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2288714412544098 3.7839e-08   q 2.347413127747034 1.1439e-07 au tp 2457747.885451882254 (2016-Dec-25.38545188) 7.2518e-05 TDB node 170.2834666881527 3.0218e-05 deg peri 108.468740247675 3.3125e-05 deg i 8.652757005480392 5.8021e-06 deg   Orbit Determination Parameters    # obs. used (total)      321      data-arc span      7562 days (20.70 yr)      first obs. used      2000-05-04      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55521      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:46:11   Additional Information  Jupiter MOID = 1.54545 au   T_jup = 3.182  Orbit Covariance (6×6)   e q tp node peri i e 1.431812568806944E-15 -4.268857371625105E-15 -2.403358708915021E-13 6.800100772013404E-15 -2.069937582178939E-14 3.812021250483085E-16 q -4.268857371625105E-15 1.308598067995103E-14 1.147019432721669E-12 -2.994281425427164E-14 1.26324624463487E-13 -4.699561317441734E-15 tp -2.403358708915021E-13 1.147019432721669E-12 5.258804706055768E-9 -2.596823163159915E-12 1.001951305897209E-9 2.448063852015016E-12 node 6.800100772013404E-15 -2.994281425427164E-14 -2.596823163159915E-12 9.13118178529983E-10 -9.026519844420378E-10 3.80227221595247E-11 peri -2.069937582178939E-14 1.26324624463487E-13 1.001951305897209E-9 -9.026519844420378E-10 1.09725583026981E-9 -3.704681415266379E-11 i 3.812021250483085E-16 -4.699561317441734E-15 2.448063852015016E-12 3.80227221595247E-11 -3.704681415266379E-11 3.366453741999952E-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 15.74   n/a E2021B55   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 ] 2021-Mar-08 15:50 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin