+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101335 (1998 SK171) Classification: Main-belt Asteroid          SPK-ID: 2101335 [ 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 .21392993944652 3.6756e-08   a 2.345242078928428 6.4961e-09 au q 1.843524582995838 8.5994e-08 au i 1.811820322359768 4.49e-06 deg node 189.1107605694808 0.00012784 deg peri 230.4092454809394 0.00012838 deg M 354.971926571455 1.1618e-05 deg tp 2459018.822260528412 (2020-Jun-18.32226053) 4.2372e-05 TDB period 1311.837204441344 3.59 5.4505e-06 1.492e-08 d yr n .2744242950125116 1.1402e-09 deg/d Q 2.846959574861017 7.8858e-09 au   Orbit Determination Parameters    # obs. used (total)      613      data-arc span      10545 days (28.87 yr)      first obs. used      1991-12-07      last obs. used      2020-10-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53443      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 20:01:10   Additional Information  Earth MOID = .856634 au   Jupiter MOID = 2.49406 au   T_jup = 3.530  [ 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 16.5   n/a MPO244925   101335 (1998 SK171)          Discovered 1998-Sep-18 by ODAS at Caussols Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2020-Nov-24 18:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin