+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   (2017 DP121) Classification: TransNeptunian Object          SPK-ID: 3802113 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] [ show orbit diagram ] Orbital Elements at Epoch 2458007.5 (2017-Sep-11.0) TDB Reference: JPL 4 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .4783189786843507 0.14516   a 63.52192984008802 11.603 au q 33.13818523491814 3.1678 au i 14.03062666226157 0.025174 deg node 123.1787280287218 0.099998 deg peri 290.7471202857315 7.6283 deg M 56.98923688865054 26.463 deg tp 2428734.024082680280 (1937-Jul-19.52408268) 5572.2 TDB period 184920.0288613417 506.28 50669 138.7 d yr n .001946787496285425 0.00053342 deg/d Q 93.9056744452579 17.154 au   Orbit Determination Parameters    # obs. used (total)      12      data-arc span      386 days (1.06 yr)      first obs. used      2017-02-24      last obs. used      2018-03-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      8      norm. resid. RMS      .23404      source      ORB      producer      Otto Matic      solution date      2021-Apr-15 18:43:08   Additional Information  Earth MOID = 32.1758 au   Jupiter MOID = 28.2544 au   T_jup = 6.036  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 7.3   n/a MPO544997   [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters ] 2021-Apr-23 02:29 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin