+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227248 (2005 SJ54) Classification: Main-belt Asteroid          SPK-ID: 2227248 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1257423172964409 5.6635e-08   a 2.369492485531668 1.4148e-08 au q 2.071547009584413 1.3898e-07 au i 1.369791354989018 5.3072e-06 deg node 14.37868791980024 0.00023733 deg peri 143.8521032572724 0.00023852 deg M 292.5468555949122 2.5676e-05 deg tp 2459450.121006123646 (2021-Aug-23.62100612) 9.6274e-05 TDB period 1332.236814118547 3.65 1.1932e-05 3.267e-08 d yr n .270222227898865 2.4202e-09 deg/d Q 2.667437961478923 1.5927e-08 au   Orbit Determination Parameters    # obs. used (total)      308      data-arc span      6617 days (18.12 yr)      first obs. used      2002-12-31      last obs. used      2021-02-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56963      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 00:39:01   Additional Information  Earth MOID = 1.08053 au   Jupiter MOID = 2.31213 au   T_jup = 3.535  [ 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 17.0   n/a MPO396680   227248 (2005 SJ54)          Discovered 2005-Sep-25 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-19 07:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin