+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   117345 (2004 XO41) Classification: Main-belt Asteroid          SPK-ID: 2117345 [ 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 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1732141546978179 4.9294e-08   a 2.743017218527032 2.1203e-08 au q 2.267887809698313 1.3767e-07 au i 13.33522844304229 6.1937e-06 deg node 287.5954868200953 3.0452e-05 deg peri 129.9116511441721 3.9276e-05 deg M 178.5990150208399 2.3032e-05 deg tp 2458177.276449317046 (2018-Feb-27.77644932) 0.00010339 TDB period 1659.362333052522 4.54 1.924e-05 5.268e-08 d yr n .2169508086505452 2.5155e-09 deg/d Q 3.218146627355751 2.4876e-08 au   Orbit Determination Parameters    # obs. used (total)      436      data-arc span      8515 days (23.31 yr)      first obs. used      1995-12-30      last obs. used      2019-04-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .51907      source      ORB      producer      Otto Matic      solution date      2019-Jul-13 19:29:56   Additional Information  Earth MOID = 1.30572 au   Jupiter MOID = 2.15019 au   T_jup = 3.289  [ 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 15.2   n/a MPO338086   117345 (2004 XO41)          Discovered 2004-Dec-11 by CINEOS at Campo Imperatore Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Aug-08 04:33 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin