+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227890 (2007 EJ57) Classification: Main-belt Asteroid          SPK-ID: 2227890 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ 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 .1566492636154382 8.5539e-08   a 2.339154605346498 1.5367e-08 au q 1.972727758936308 1.9872e-07 au i 2.597783450579449 8.9418e-06 deg node 151.8500299109811 0.00017035 deg peri 279.689341699565 0.00017426 deg M 15.58877611365974 3.1437e-05 deg tp 2459143.915649304995 (2020-Oct-21.41564931) 0.00011402 TDB period 1306.732876377142 3.58 1.2877e-05 3.526e-08 d yr n .2754962444949603 2.7148e-09 deg/d Q 2.705581451756688 1.7774e-08 au   Orbit Determination Parameters    # obs. used (total)      143      data-arc span      8177 days (22.39 yr)      first obs. used      1998-08-30      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .67308      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 13:12:24   Additional Information  Earth MOID = .98878 au   Jupiter MOID = 2.55944 au   T_jup = 3.548  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 17.7   n/a MPO440188   227890 (2007 EJ57)          Discovered 2007-Mar-09 by Spacewatch at Kitt Peak Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 00:44 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin