+ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1862453154424941 3.3693e-08   a 2.422470405197776 1.0281e-08 au q 1.97129664043161 8.3132e-08 au i 1.206946240725323 4.222e-06 deg node 254.4992668588045 0.00019865 deg peri 21.99121652794541 0.00019904 deg M 86.43741958842794 1.3906e-05 deg tp 2458669.837123340255 (2019-Jul-05.33712334) 5.2545e-05 TDB period 1377.165539696941 3.77 8.7671e-06 2.4e-08 d yr n .2614064828250215 1.6641e-09 deg/d Q 2.873644169963943 1.2196e-08 au   Orbit Determination Parameters    # obs. used (total)      1159      data-arc span      9895 days (27.09 yr)      first obs. used      1992-03-01      last obs. used      2019-04-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55563      source      ORB      producer      Otto Matic      solution date      2019-Jul-12 19:31:35   Additional Information  Earth MOID = .954952 au   Jupiter MOID = 2.24854 au   T_jup = 3.488  [ hide covariance matrix ] Orbital Elements at Epoch 2455976.5 (2012-Feb-19.0) TDB Reference: JPL 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1862226766472695 3.3883e-08   q 1.971149952783676 8.3734e-08 au tp 2455911.326753306153 (2011-Dec-15.82675331) 5.0251e-05 TDB node 254.6360480872089 0.00019835 deg peri 21.21934089663386 0.00019874 deg i 1.207507259177469 4.2295e-06 deg   Orbit Determination Parameters    # obs. used (total)      1159      data-arc span      9895 days (27.09 yr)      first obs. used      1992-03-01      last obs. used      2019-04-04      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55563      source      ORB      producer      Otto Matic      solution date      2019-Jul-12 19:31:35   Additional Information  Jupiter MOID = 2.24854 au   T_jup = 3.488  Orbit Covariance (6×6)   e q tp node peri i e 1.148031521038278E-15 -2.823166421342517E-15 -4.677340889026478E-13 -8.130460498781789E-15 -9.983886878626739E-14 7.562587516060092E-17 q -2.823166421342517E-15 7.011326011127525E-15 1.129258850697892E-12 1.971204975007608E-14 2.410420086081038E-13 -1.47124379857467E-16 tp -4.677340889026478E-13 1.129258850697892E-12 2.525140012017202E-9 6.6929225320374E-13 6.427275058552663E-10 9.555394547660181E-14 node -8.130460498781789E-15 1.971204975007608E-14 6.6929225320374E-13 3.934433819481976E-8 -3.933538414396982E-8 -2.100720418092359E-10 peri -9.983886878626739E-14 2.410420086081038E-13 6.427275058552663E-10 -3.933538414396982E-8 3.949910903730516E-8 2.100523647786927E-10 i 7.562587516060092E-17 -1.47124379857467E-16 9.555394547660181E-14 -2.100720418092359E-10 2.100523647786927E-10 1.788844647827613E-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 ] 2020-Jul-06 00:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin