+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227078 (2005 LZ18) Classification: Jupiter Trojan          SPK-ID: 2227078 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0669998175178788 9.0818e-08   a 5.113291220856221 1.4651e-07 au q 4.770701642143083 5.4412e-07 au i 16.37703306754021 8.2506e-06 deg node 217.9330535159127 2.2016e-05 deg peri 192.0957648641048 5.6829e-05 deg M 330.952499722642 5.3594e-05 deg tp 2459541.265392968163 (2021-Nov-22.76539297) 0.00062962 TDB period 4223.273613811172 11.56 0.00018152 4.97e-07 d yr n .08524193147768332 3.6637e-09 deg/d Q 5.455880799569359 1.5633e-07 au   Orbit Determination Parameters    # obs. used (total)      262      data-arc span      8461 days (23.16 yr)      first obs. used      1997-10-21      last obs. used      2020-12-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .42681      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 13:10:41   Additional Information  Earth MOID = 3.78118 au   Jupiter MOID = .0223394 au   T_jup = 2.916  [ 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 13.4   n/a MPO494246   227078 (2005 LZ18)          Discovered 2005-Jun-08 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-11 13:38 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin