+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   78421 (2002 QE41) Classification: Main-belt Asteroid          SPK-ID: 2078421 [ 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 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1137247333966129 6.8479e-08   a 3.017908227876879 2.3732e-08 au q 2.674697419246137 2.0709e-07 au i 9.597335851070566 6.9728e-06 deg node 340.4906745259355 2.7373e-05 deg peri 347.5298647850436 3.3952e-05 deg M 168.964163539645 2.133e-05 deg tp 2458301.727920704693 (2018-Jul-02.22792070) 0.00011219 TDB period 1914.950139532944 5.24 2.2588e-05 6.184e-08 d yr n .1879944509092043 2.2175e-09 deg/d Q 3.361119036507622 2.6431e-08 au   Orbit Determination Parameters    # obs. used (total)      651      data-arc span      10390 days (28.45 yr)      first obs. used      1992-10-03      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53111      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 13:36:43   Additional Information  Earth MOID = 1.66269 au   Jupiter MOID = 1.99772 au   T_jup = 3.216  [ hide covariance matrix ] Orbital Elements at Epoch 2457529.5 (2016-May-21.0) TDB Reference: JPL 27 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1132163169558908 6.8643e-08   q 2.679347470182968 2.0689e-07 au tp 2458295.719575473848 (2018-Jun-26.21957547) 0.00011324 TDB node 340.5833486676109 2.7305e-05 deg peri 346.1277734221565 3.4e-05 deg i 9.608487928351561 6.9783e-06 deg   Orbit Determination Parameters    # obs. used (total)      651      data-arc span      10390 days (28.45 yr)      first obs. used      1992-10-03      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53111      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 13:36:43   Additional Information  Jupiter MOID = 1.99772 au   T_jup = 3.216  Orbit Covariance (6×6)   e q tp node peri i e 4.711832657325021E-15 -1.412711201377156E-14 2.010940943811137E-12 4.620021270620487E-15 2.540606588117855E-13 6.089803621026985E-15 q -1.412711201377156E-14 4.280308216817626E-14 -5.813392803792431E-12 -1.486280623704887E-14 -7.626853744271322E-13 -1.817705180851629E-14 tp 2.010940943811137E-12 -5.813392803792431E-12 1.282222514005901E-8 -1.144926659790405E-11 2.295975551978073E-9 -2.326919538697901E-12 node 4.620021270620487E-15 -1.486280623704887E-14 -1.144926659790405E-11 7.45565138602435E-10 -7.36930539340229E-10 -1.594075690269632E-11 peri 2.540606588117855E-13 -7.626853744271322E-13 2.295975551978073E-9 -7.36930539340229E-10 1.156017998873783E-9 1.516076506204705E-11 i 6.089803621026985E-15 -1.817705180851629E-14 -2.326919538697901E-12 -1.594075690269632E-11 1.516076506204705E-11 4.869692414930951E-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 14.63   n/a E2020-QM9   78421 (2002 QE41)          Discovered 2002-Aug-29 by NEAT at Palomar Reference: 20040415/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-23 15:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin