+ 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2140698065660226 2.9988e-08   a 2.345620270371369 6.1073e-09 au q 1.843493792815628 6.877e-08 au i 1.811781308782266 4.0318e-06 deg node 189.1045851913126 0.00011643 deg peri 230.4125555337429 0.00011707 deg M 49.84517639990702 1.1675e-05 deg tp 2459018.820626968332 (2020-Jun-18.32062697) 4.2209e-05 TDB period 1312.154535609641 3.59 5.1247e-06 1.403e-08 d yr n .2743579283005262 1.0715e-09 deg/d Q 2.847746747927109 7.4147e-09 au   Orbit Determination Parameters    # obs. used (total)      737      data-arc span      10691 days (29.27 yr)      first obs. used      1991-12-07      last obs. used      2021-03-15      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .51769      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 15:36:18   Additional Information  Earth MOID = .855904 au   Jupiter MOID = 2.49401 au   T_jup = 3.529  [ 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 16.4   n/a MPO532317   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 ] 2021-Apr-22 12:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin