+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   312368 (2008 EF5) Classification: Main-belt Asteroid          SPK-ID: 2312368 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0689279451883807 4.235e-08   a 2.972290036901126 2.698e-08 au q 2.767416192153635 1.2471e-07 au i 11.96387025439758 4.7866e-06 deg node 128.1996715795468 1.9344e-05 deg peri 5.588580526464726 4.2662e-05 deg M 179.7522063932791 4.126e-05 deg tp 2458065.940547220427 (2017-Nov-08.44054722) 0.00020886 TDB period 1871.695539939842 5.12 2.5485e-05 6.977e-08 d yr n .1923389741109127 2.6188e-09 deg/d Q 3.177163881648617 2.884e-08 au   Orbit Determination Parameters    # obs. used (total)      429      data-arc span      7348 days (20.12 yr)      first obs. used      2000-09-05      last obs. used      2020-10-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51132      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 18:47:43   Additional Information  Earth MOID = 1.78209 au   Jupiter MOID = 1.86391 au   T_jup = 3.226  [ hide covariance matrix ] Orbital Elements at Epoch 2457994.5 (2017-Aug-29.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06682176301924572 4.1828e-08   q 2.772480968960378 1.2294e-07 au tp 2458055.206443037747 (2017-Oct-28.70644304) 0.00021713 TDB node 128.3369403938927 1.9421e-05 deg peri 3.628149291154513 4.4125e-05 deg i 11.938914177737 4.7778e-06 deg   Orbit Determination Parameters    # obs. used (total)      429      data-arc span      7348 days (20.12 yr)      first obs. used      2000-09-05      last obs. used      2020-10-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51132      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 18:47:43   Additional Information  Jupiter MOID = 1.86391 au   T_jup = 3.226  Orbit Covariance (6×6)   e q tp node peri i e 1.749602673864062E-15 -5.036620985135074E-15 7.989409974114942E-13 -4.525805683172928E-15 1.381131281788326E-13 2.494370406864315E-15 q -5.036620985135074E-15 1.511521379409438E-14 4.90761478988122E-14 1.005465902840863E-14 2.469019335275707E-14 -5.624360818135655E-15 tp 7.989409974114942E-13 4.90761478988122E-14 4.714428443412427E-8 -3.641616348688343E-11 8.621455087396596E-9 2.795454847871339E-13 node -4.525805683172928E-15 1.005465902840863E-14 -3.641616348688343E-11 3.771572309487082E-10 -3.753394304846666E-10 -1.800906084527878E-12 peri 1.381131281788326E-13 2.469019335275707E-14 8.621455087396596E-9 -3.753394304846666E-10 1.947030496988151E-9 1.735935060672279E-12 i 2.494370406864315E-15 -5.624360818135655E-15 2.795454847871339E-13 -1.800906084527878E-12 1.735935060672279E-12 2.282745406375749E-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 15.4   n/a MPO437378   312368 (2008 EF5)          Discovered 2008-Mar-02 by PMO NEO Survey Program at Purple Mountain Reference: 20120109/Numbers.arc Last Updated: 2012-01-11 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-20 21:01 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin