+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   101212 (1998 SK51) Classification: Main-belt Asteroid          SPK-ID: 2101212 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .19597108581545 4.8752e-08   a 2.626196907596262 1.0937e-08 au q 2.111538248049445 1.2918e-07 au i 12.25562824882997 5.7311e-06 deg node 13.64266944594078 1.7952e-05 deg peri 340.6080633476611 2.1316e-05 deg M 51.06611747357957 9.8259e-06 deg tp 2458779.994363896593 (2019-Oct-23.49436390) 4.2239e-05 TDB period 1554.495092333916 4.26 9.7111e-06 2.659e-08 d yr n .2315864500154173 1.4467e-09 deg/d Q 3.140855567143078 1.3081e-08 au   Orbit Determination Parameters    # obs. used (total)      664      data-arc span      8088 days (22.14 yr)      first obs. used      1998-09-13      last obs. used      2020-11-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57875      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:28:28   Additional Information  Earth MOID = 1.11172 au   Jupiter MOID = 2.31644 au   T_jup = 3.343  [ hide covariance matrix ] Orbital Elements at Epoch 2457411.5 (2016-Jan-24.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1982483238638524 4.8991e-08   q 2.104378061992317 1.3014e-07 au tp 2457224.790272689820 (2015-Jul-21.29027269) 4.1058e-05 TDB node 13.70843122134205 1.7912e-05 deg peri 340.3506619854084 2.1169e-05 deg i 12.27685047057074 5.7393e-06 deg   Orbit Determination Parameters    # obs. used (total)      664      data-arc span      8088 days (22.14 yr)      first obs. used      1998-09-13      last obs. used      2020-11-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57875      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 04:28:28   Additional Information  Jupiter MOID = 2.31644 au   T_jup = 3.343  Orbit Covariance (6×6)   e q tp node peri i e 2.400150916887731E-15 -6.361362609012935E-15 2.177934803128785E-13 -1.512468553080056E-14 4.835428547568955E-14 -5.373495061264076E-15 q -6.361362609012935E-15 1.693630886899832E-14 -6.134281585157731E-13 3.903034150064318E-14 -1.362436033659364E-13 1.454065209949435E-14 tp 2.177934803128785E-13 -6.134281585157731E-13 1.685762469435143E-9 -8.48475351947662E-12 4.734253680144125E-10 -1.55511668653484E-13 node -1.512468553080056E-14 3.903034150064318E-14 -8.48475351947662E-12 3.208569438983721E-10 -3.148176621452192E-10 -1.706280611665483E-11 peri 4.835428547568955E-14 -1.362436033659364E-13 4.734253680144125E-10 -3.148176621452192E-10 4.481280840069627E-10 1.672642979445743E-11 i -5.373495061264076E-15 1.454065209949435E-14 -1.55511668653484E-13 -1.706280611665483E-11 1.672642979445743E-11 3.293921309710612E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.8   n/a MPO493568   101212 (1998 SK51)          Discovered 1998-Sep-27 by Spacewatch at Kitt Peak Reference: 20051019/Numbers.arc Last Updated: 2005-10-26 Alternate Designations  1998 SK51 = 2002 SJ56  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-19 03:56 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin