+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   79740 (1998 SQ140) Classification: Main-belt Asteroid          SPK-ID: 2079740 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2207005064582888 4.6269e-08   a 2.266410567657839 8.4268e-09 au q 1.766212607533336 1.0506e-07 au i 3.869770964076738 5.721e-06 deg node 357.9351954447085 5.7411e-05 deg peri 310.4731273566767 5.8745e-05 deg M 175.1198647180686 1.369e-05 deg tp 2458394.267494634854 (2018-Oct-02.76749463) 4.6592e-05 TDB period 1246.253257920285 3.41 6.9506e-06 1.903e-08 d yr n .2888658446524413 1.6111e-09 deg/d Q 2.766608527782342 1.0287e-08 au   Orbit Determination Parameters    # obs. used (total)      795      data-arc span      10364 days (28.38 yr)      first obs. used      1991-09-08      last obs. used      2020-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60645      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 18:46:04   Additional Information  Earth MOID = .754742 au   Jupiter MOID = 2.50605 au   T_jup = 3.580  [ hide covariance matrix ] Orbital Elements at Epoch 2456367.5 (2013-Mar-16.0) TDB Reference: JPL 24 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2201818283372988 4.6257e-08   q 1.768091793660576 1.051e-07 au tp 2455902.399458776110 (2011-Dec-06.89945878) 4.6238e-05 TDB node 358.0341392807578 5.7391e-05 deg peri 310.4811388053417 5.8738e-05 deg i 3.87031819100834 5.7205e-06 deg   Orbit Determination Parameters    # obs. used (total)      795      data-arc span      10364 days (28.38 yr)      first obs. used      1991-09-08      last obs. used      2020-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .60645      source      ORB      producer      Otto Matic      solution date      2020-Feb-23 18:46:04   Additional Information  Jupiter MOID = 2.50605 au   T_jup = 3.580  Orbit Covariance (6×6)   e q tp node peri i e 2.139737648941338E-15 -4.851956890327075E-15 1.11640300502858E-12 5.13961289869209E-15 2.382708325503456E-13 -9.594845911747375E-16 q -4.851956890327075E-15 1.104564213684841E-14 -2.569324376672003E-12 -1.2860696635971E-14 -5.467183784168409E-13 2.182778854651474E-15 tp 1.11640300502858E-12 -2.569324376672003E-12 2.137961093372103E-9 3.109268987680326E-12 5.835137836200078E-10 -2.080353115497318E-12 node 5.13961289869209E-15 -1.2860696635971E-14 3.109268987680326E-12 3.293707544077103E-9 -3.284592161999602E-9 2.542604750848035E-11 peri 2.382708325503456E-13 -5.467183784168409E-13 5.835137836200078E-10 -3.284592161999602E-9 3.450156484535488E-9 -2.594581440528008E-11 i -9.594845911747375E-16 2.182778854651474E-15 -2.080353115497318E-12 2.542604750848035E-11 -2.594581440528008E-11 3.272401133482628E-11 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.8   n/a MPO348013   79740 (1998 SQ140)          Discovered 1998-Sep-26 by LINEAR at Socorro Reference: 20040504/Numbers.arc Last Updated: 2004-07-16 [ show close-approach data ] Alternate Designations  1998 SQ140 = 1991 RX30  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-21 04:39 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin