+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   100538 (1997 ET10) Classification: Main-belt Asteroid          SPK-ID: 2100538 [ 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 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1167042747549608 7.368e-08   a 3.117806595208449 2.887e-08 au q 2.753945237688414 2.206e-07 au i 9.61989226675241 7.017e-06 deg node 7.322308790314876 3.2642e-05 deg peri 43.47056724875233 4.1742e-05 deg M 236.4340940447526 2.6382e-05 deg tp 2459890.689488654828 (2022-Nov-07.18948865) 0.00015135 TDB period 2010.815313454888 5.51 2.7929e-05 7.647e-08 d yr n .1790318571731309 2.4867e-09 deg/d Q 3.481667952728485 3.2239e-08 au   Orbit Determination Parameters    # obs. used (total)      315      data-arc span      8505 days (23.29 yr)      first obs. used      1997-03-02      last obs. used      2020-06-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .58309      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:32:38   Additional Information  Earth MOID = 1.772 au   Jupiter MOID = 1.99948 au   T_jup = 3.185  [ hide covariance matrix ] Orbital Elements at Epoch 2456852.5 (2014-Jul-14.0) TDB Reference: JPL 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1191833623298812 7.2967e-08   q 2.742570728185548 2.1691e-07 au tp 2455879.057587353530 (2011-Nov-13.55758735) 0.00013577 TDB node 7.41159748887057 3.2636e-05 deg peri 44.17509419604351 4.149e-05 deg i 9.625793401910796 7.0216e-06 deg   Orbit Determination Parameters    # obs. used (total)      315      data-arc span      8505 days (23.29 yr)      first obs. used      1997-03-02      last obs. used      2020-06-14      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .58309      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:32:38   Additional Information  Jupiter MOID = 1.99948 au   T_jup = 3.185  Orbit Covariance (6×6)   e q tp node peri i e 5.324130241430597E-15 -1.573141139785216E-14 -2.268939500083949E-12 -1.11740892351078E-14 -5.344943689603061E-13 -6.440490115454417E-15 q -1.573141139785216E-14 4.70489250471351E-14 7.084462559105378E-12 3.223122032353722E-14 1.700875686853507E-12 1.960307801597568E-14 tp -2.268939500083949E-12 7.084462559105378E-12 1.843387689533075E-8 -1.063418326617378E-13 3.491115903733468E-9 -1.065289867085112E-11 node -1.11740892351078E-14 3.223122032353722E-14 -1.063418326617378E-13 1.065098541965965E-9 -1.049743858923871E-9 3.556298644061772E-11 peri -5.344943689603061E-13 1.700875686853507E-12 3.491115903733468E-9 -1.049743858923871E-9 1.721457869352235E-9 -3.675465952248703E-11 i -6.440490115454417E-15 1.960307801597568E-14 -1.065289867085112E-11 3.556298644061772E-11 -3.675465952248703E-11 4.930345198892156E-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 15.44   n/a E2021B55   100538 (1997 ET10)          Discovered 1997-Mar-07 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ show close-approach data ] Alternate Designations  1997 ET10 = 2000 WV70  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-21 00:30 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin