+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   180389 (2004 AD2) Classification: Main-belt Asteroid          SPK-ID: 2180389 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1500969705450872 5.0092e-08   a 2.38549471725045 1.2396e-08 au q 2.027439186939848 1.1816e-07 au i 1.670463695549023 4.6807e-06 deg node 84.59416976532675 0.00017916 deg peri 55.77862798893285 0.00017994 deg M 195.9988827172225 1.7099e-05 deg tp 2459813.570503544280 (2022-Aug-22.07050354) 6.6011e-05 TDB period 1345.75535174795 3.68 1.049e-05 2.872e-08 d yr n .2675077602570258 2.0852e-09 deg/d Q 2.743550247561052 1.4257e-08 au   Orbit Determination Parameters    # obs. used (total)      376      data-arc span      8537 days (23.37 yr)      first obs. used      1997-04-03      last obs. used      2020-08-17      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .53569      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:26:19   Additional Information  Earth MOID = 1.04097 au   Jupiter MOID = 2.27317 au   T_jup = 3.520  [ 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 17.24   n/a E2021B55   180389 (2004 AD2)          Discovered 2004-Jan-13 by LONEOS at Anderson Mesa Reference: 20080321/Numbers.arc Last Updated: 2008-03-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-20 22:02 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin