+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   15328 (1993 RJ9) Classification: Main-belt Asteroid          SPK-ID: 2015328 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1862452628358208 3.2839e-08   a 2.422470409509712 9.0543e-09 au q 1.971296771378578 8.0116e-08 au i 1.206943937910772 4.1686e-06 deg node 254.499396111726 0.000182 deg peri 21.99109277915185 0.00018236 deg M 86.43741500973834 1.2574e-05 deg tp 2458669.837139972990 (2019-Jul-05.33713997) 4.7598e-05 TDB period 1377.165543373921 3.77 7.721e-06 2.114e-08 d yr n .2614064821270761 1.4656e-09 deg/d Q 2.873644047640847 1.0741e-08 au   Orbit Determination Parameters    # obs. used (total)      1286      data-arc span      10482 days (28.70 yr)      first obs. used      1992-03-01      last obs. used      2020-11-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53574      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:59:35   Additional Information  Earth MOID = .954952 au   Jupiter MOID = 2.24854 au   T_jup = 3.488  [ hide covariance matrix ] Orbital Elements at Epoch 2456322.5 (2013-Jan-30.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1860506723428222 3.3035e-08   q 1.972155959929616 8.0616e-08 au tp 2455911.548337810727 (2011-Dec-16.04833781) 4.6188e-05 TDB node 254.6271017759077 0.00018167 deg peri 21.34017913155056 0.00018203 deg i 1.207651385696868 4.1759e-06 deg   Orbit Determination Parameters    # obs. used (total)      1286      data-arc span      10482 days (28.70 yr)      first obs. used      1992-03-01      last obs. used      2020-11-11      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53574      source      ORB      producer      Otto Matic      solution date      2020-Dec-18 02:59:35   Additional Information  Jupiter MOID = 2.24854 au   T_jup = 3.488  Orbit Covariance (6×6)   e q tp node peri i e 1.091308343493279E-15 -2.651971795282314E-15 -4.622354584258754E-13 -2.410481767365048E-15 -1.101653822515781E-13 6.677660994180244E-17 q -2.651971795282314E-15 6.498972468534922E-15 1.104496150509785E-12 5.293754948065521E-15 2.673981289831038E-13 -1.455865083423685E-16 tp -4.622354584258754E-13 1.104496150509785E-12 2.133337218741312E-9 -3.511026668735463E-12 5.442770279942314E-10 9.128899220614364E-14 node -2.410481767365048E-15 5.293754948065521E-15 -3.511026668735463E-12 3.30040973970048E-8 -3.299762026655482E-8 -1.940079360296444E-10 peri -1.101653822515781E-13 2.673981289831038E-13 5.442770279942314E-10 -3.299762026655482E-8 3.313624289321362E-8 1.939920446286427E-10 i 6.677660994180244E-17 -1.455865083423685E-16 9.128899220614364E-14 -1.940079360296444E-10 1.939920446286427E-10 1.743840473849118E-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 14.9   n/a MPO435843   15328 (1993 RJ9)          Discovered 1993-Sep-14 by Debehogne, H., Elst, E. W. at La Silla Reference: 20000621/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1993 RJ9 = 1992 EL15 = 1998 XE21  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-17 11:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin