+ 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 2459000.5 (2020-May-31.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1136518137436199 6.9083e-08   a 3.017894298799749 2.5495e-08 au q 2.674905138054627 2.0853e-07 au i 9.596439241233055 7.113e-06 deg node 340.4949659756944 2.9957e-05 deg peri 347.4617943951823 3.7357e-05 deg M 131.447258074911 2.2357e-05 deg tp 2458301.296659671984 (2018-Jul-01.79665967) 0.00011911 TDB period 1914.936881944209 5.24 2.4266e-05 6.644e-08 d yr n .1879957524419797 2.3823e-09 deg/d Q 3.36088345954487 2.8393e-08 au   Orbit Determination Parameters    # obs. used (total)      570      data-arc span      10269 days (28.11 yr)      first obs. used      1992-10-03      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5536      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:06:31   Additional Information  Earth MOID = 1.66483 au   Jupiter MOID = 1.99772 au   T_jup = 3.216  [ hide covariance matrix ] Orbital Elements at Epoch 2457229.5 (2015-Jul-26.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .11450418114082 6.9736e-08   q 2.67296054643066 2.105e-07 au tp 2456374.516641543203 (2013-Mar-23.01664154) 0.00012077 TDB node 340.5858047198934 2.9867e-05 deg peri 345.491486265988 3.717e-05 deg i 9.615482950912376 7.1209e-06 deg   Orbit Determination Parameters    # obs. used (total)      570      data-arc span      10269 days (28.11 yr)      first obs. used      1992-10-03      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5536      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:06:31   Additional Information  Jupiter MOID = 1.99772 au   T_jup = 3.216  Orbit Covariance (6×6)   e q tp node peri i e 4.863075613126411E-15 -1.459656744933703E-14 1.699811045323052E-12 1.684921808204747E-15 2.093878325539382E-13 6.086153415386957E-15 q -1.459656744933703E-14 4.430861530943695E-14 -5.676165482847425E-12 -7.520898622792915E-15 -6.887974941082206E-13 -1.742411581092231E-14 tp 1.699811045323052E-12 -5.676165482847425E-12 1.458433989522204E-8 -1.730569810576525E-11 2.679023252699961E-9 -5.669120599972248E-12 node 1.684921808204747E-15 -7.520898622792915E-15 -1.730569810576525E-11 8.920246394029083E-10 -8.823226109650906E-10 -4.28235395078513E-12 peri 2.093878325539382E-13 -6.887974941082206E-13 2.679023252699961E-9 -8.823226109650906E-10 1.381593293222274E-9 3.076258411006687E-12 i 6.086153415386957E-15 -1.742411581092231E-14 -5.669120599972248E-12 -4.28235395078513E-12 3.076258411006687E-12 5.070703100166282E-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 14.7   n/a MPO319984   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-Jan-20 01:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin