+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   180703 (2004 HW46) Classification: Main-belt Asteroid          SPK-ID: 2180703 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 19 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1815569990258254 4.3065e-08   a 2.722100670647841 1.7424e-08 au q 2.227884241838832 1.2252e-07 au i 13.05348238889873 5.2211e-06 deg node .9703848935350573 1.9951e-05 deg peri 262.1796249811865 2.734e-05 deg M 217.037449174036 2.3147e-05 deg tp 2459851.940099987328 (2022-Sep-29.44009999) 0.00010891 TDB period 1640.418659575613 4.49 1.575e-05 4.312e-08 d yr n .219456172300024 2.1071e-09 deg/d Q 3.21631709945685 2.0588e-08 au   Orbit Determination Parameters    # obs. used (total)      445      data-arc span      8923 days (24.43 yr)      first obs. used      1996-09-12      last obs. used      2021-02-16      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .5608      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:27:36   Additional Information  Earth MOID = 1.25708 au   Jupiter MOID = 2.03481 au   T_jup = 3.297  [ show covariance matrix ] [ 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 MPO264420   180703 (2004 HW46)          Discovered 2004-Apr-22 by LINEAR at Socorro Reference: 20080321/Numbers.arc Last Updated: 2008-03-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 06:49 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin