+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   344861 (2004 HP38) Classification: Mars-crossing Asteroid          SPK-ID: 2344861 [ 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 11 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .3411980339402057 4.8155e-08   a 2.407280407146861 7.3341e-09 au q 1.585921065085574 1.1508e-07 au i 6.586139726418393 5.1144e-06 deg node 126.5976266435258 6.0021e-05 deg peri 135.5836680256025 6.0991e-05 deg M 93.043168812833 8.4351e-06 deg tp 2458647.909634775272 (2019-Jun-13.40963478) 3.1572e-05 TDB period 1364.232679308692 3.74 6.2344e-06 1.707e-08 d yr n .2638846037484057 1.2059e-09 deg/d Q 3.228639749208147 9.8364e-09 au   Orbit Determination Parameters    # obs. used (total)      309      data-arc span      5699 days (15.60 yr)      first obs. used      2004-03-18      last obs. used      2019-10-25      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55531      source      ORB      producer      Otto Matic      solution date      2020-Feb-25 23:07:00   Additional Information  Earth MOID = .578743 au   Jupiter MOID = 1.89076 au   T_jup = 3.432  [ show covariance matrix ] [ 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 17.2   n/a MPO476593   344861 (2004 HP38)          Discovered 2004-Apr-23 by CSS at Catalina Reference: 20121128/Numbers.arc Last Updated: 2012-12-03 [ hide close-approach data ] Close-Approach Data   ...sorted by Date/Time (TDB) Date/Time (TDB) Time Uncertainty (days_HH:MM) Body Nominal Distance (au) Minimum Distance (au) Maximum Distance (au) V-relative (km/s) V-infinity (km/s) JD (TDB) Time Uncertainty (minutes) Semi-major axis (km) Semi-minor axis (km) range-LOV angle (deg) N-sigma BP Orbit Ref. Reference Modified 1954-Mar-26 03:53 < 00:01 Jupiter 1.95182515864664 1.95182449165889 1.95182582563301 0.937998498367283 0.109144417728557 2434827.661712350 0.707578996750779 246247.21507895 2384.09386433778 -1.08901096417974 1475336.66897165 T 11 CATAB v2.0f-lin.ifort 2020-Feb-25 23:07:11 2020-Feb-25 23:07 1964-Dec-26 09:09 < 00:01 Jupiter 1.9700325788476 1.9700319480363 1.97003320966715 0.521266040107209 n/a 2438755.881103765 0.606643647465882 401.479315168177 27.2013414428973 87.7396457027177 10823463.407242 F 11 CATAB v2.0f-lin.ifort 2020-Feb-25 23:07:11 2020-Feb-25 23:07 2024-Dec-16 06:09 < 00:01 Jupiter 1.87928018456041 1.87927975085351 1.87928061831105 0.700975716261455 n/a 2460660.756360515 0.289624895311784 546.005458813339 12.1064461429339 88.1184750999594 23203598.4827709 F 11 CATAB v2.0f-lin.ifort 2020-Feb-25 23:07:11 2020-Feb-25 23:07 2095-Sep-08 20:56 00:01 Jupiter 1.93129029385459 1.9312895116382 1.93129107621903 0.541298485471496 n/a 2486494.371923882 1.0724265136263 1091.81384341014 24.7569266564245 88.4173437359997 11662798.8888338 F 11 CATAB v2.0f-lin.ifort 2020-Feb-25 23:07:11 2020-Feb-25 23:07 2155-Aug-30 19:40 00:02 Jupiter 1.89250348756706 1.89250294292688 1.89250403224877 0.877288754605818 n/a 2508399.319554417 1.65501530481648 498.652447340091 12.4993282598757 87.2274392819038 22618142.80057 F 11 CATAB v2.0f-lin.ifort 2020-Feb-25 23:07:11 2020-Feb-25 23:07 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 07:37 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin