+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   226991 (2004 XL61) Classification: Inner Main-belt Asteroid          SPK-ID: 2226991 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07817019190178097 4.3672e-08   a 1.914370145317247 9.5906e-09 au q 1.764723463686758 8.4814e-08 au i 18.28181324509332 5.9774e-06 deg node 270.9982748482845 1.3742e-05 deg peri 50.24875645029905 3.8081e-05 deg M 65.78952219327745 3.6319e-05 deg tp 2458823.696227420467 (2019-Dec-06.19622742) 9.7115e-05 TDB period 967.469530203331 2.65 7.2703e-06 1.99e-08 d yr n .3721047420732098 2.7963e-09 deg/d Q 2.064016826947737 1.034e-08 au   Orbit Determination Parameters    # obs. used (total)      410      data-arc span      7051 days (19.30 yr)      first obs. used      2001-07-26      last obs. used      2020-11-14      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .5391      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 23:59:56   Additional Information  Earth MOID = .779359 au   Jupiter MOID = 3.12515 au   T_jup = 3.866  [ 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 16.7   n/a MPO437075   226991 (2004 XL61)          Discovered 2004-Dec-14 by LINEAR at Socorro Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-26 04:11 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin