+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   160865 (2001 JK2) Classification: Main-belt Asteroid          SPK-ID: 2160865 [ 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 21 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1032602272819152 4.2635e-08   a 2.977774341701733 2.4778e-08 au q 2.670288686383357 1.2237e-07 au i 10.35080178612603 4.8373e-06 deg node 114.2664283861578 2.2113e-05 deg peri 222.5775306984632 3.0328e-05 deg M 208.7700031936863 2.1975e-05 deg tp 2459988.945255748312 (2023-Feb-13.44525575) 0.00011689 TDB period 1876.878252089879 5.14 2.3426e-05 6.414e-08 d yr n .1918078594597943 2.394e-09 deg/d Q 3.285259997020109 2.7336e-08 au   Orbit Determination Parameters    # obs. used (total)      569      data-arc span      7182 days (19.66 yr)      first obs. used      2001-05-15      last obs. used      2021-01-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56397      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 19:46:20   Additional Information  Earth MOID = 1.66819 au   Jupiter MOID = 2.05477 au   T_jup = 3.228  [ 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 15.32   n/a E2020-QM9   160865 (2001 JK2)          Discovered 2001-May-15 by Spacewatch at Kitt Peak Reference: 20070828/Numbers.arc Last Updated: 2007-08-30 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-12 23:23 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin