+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   508338 (2015 SO20) Classification: TransNeptunian Object          SPK-ID: 2508338 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .8000217162647806 2.404e-05   a 165.8259958373825 0.020652 au q 33.16159804624338 0.00014466 au i 23.41614788308904 3.432e-05 deg node 33.61990172990936 1.895e-05 deg peri 354.5810313565987 0.00055221 deg M .4790269107279561 9.847e-05 deg tp 2457962.649595232159 (2017-Jul-28.14959523) 0.080108 TDB period 779969.0108195374 2135.44 145.71 0.3989 d yr n .0004615567990601792 8.6224e-08 deg/d Q 298.4903936285215 0.037174 au   Orbit Determination Parameters    # obs. used (total)      298      data-arc span      4023 days (11.01 yr)      first obs. used      2009-09-21      last obs. used      2020-09-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      1      norm. resid. RMS      .462      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 00:25:26   Additional Information  Earth MOID = 32.1676 au   Jupiter MOID = 28.1982 au   T_jup = 6.247  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 6.5   n/a MPO386929   508338 (2015 SO20)          Discovered 2010-Oct-08 by Schwamb, M. E. at La Silla Reference: Last Updated: 2017-12-07 Alternate Designations  2015 SO20 = 2010 TF182  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2021-Jan-20 23:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin