+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   469301 (1997 SK12) Classification: Main-belt Asteroid          SPK-ID: 2469301 [ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06305268135460813 1.7526e-07   a 2.702223806558485 2.6284e-08 au q 2.531841349934717 4.805e-07 au i 5.843995090318217 1.5288e-05 deg node 352.7101456423674 5.2944e-05 deg peri 13.96723795887877 9.8073e-05 deg M 47.97706099956233 7.6261e-05 deg tp 2458784.272194821349 (2019-Oct-27.77219482) 0.00034326 TDB period 1622.483917158335 4.44 2.3673e-05 6.481e-08 d yr n .2218820144796963 3.2373e-09 deg/d Q 2.872606263182254 2.7942e-08 au   Orbit Determination Parameters    # obs. used (total)      88      data-arc span      8065 days (22.08 yr)      first obs. used      1997-09-27      last obs. used      2019-10-27      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57152      source      ORB      producer      Otto Matic      solution date      2019-Nov-08 17:58:28   Additional Information  Earth MOID = 1.53007 au   Jupiter MOID = 2.42994 au   T_jup = 3.357  [ 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 17.2   n/a MPO495327   469301 (1997 SK12)          Discovered 1997-Sep-27 by Spacewatch at Kitt Peak Reference: Last Updated: 2016-08-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-23 13:40 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin