+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   305626 (2009 AH41) Classification: Main-belt Asteroid          SPK-ID: 2305626 [ 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 12 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06859505588050863 4.0016e-08   a 2.281971271356125 1.1831e-08 au q 2.125439324479736 8.8427e-08 au i 3.229846906121458 4.5173e-06 deg node 1.645808826847989 7.7182e-05 deg peri 117.0363214318411 8.6496e-05 deg M 110.4797020509728 3.8949e-05 deg tp 2458614.094161964941 (2019-May-10.59416196) 0.00013508 TDB period 1259.110036596955 3.45 9.7917e-06 2.681e-08 d yr n .2859162341148402 2.2235e-09 deg/d Q 2.438503218232514 1.2642e-08 au   Orbit Determination Parameters    # obs. used (total)      229      data-arc span      7743 days (21.20 yr)      first obs. used      1999-04-12      last obs. used      2020-06-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .62421      source      ORB      producer      Otto Matic      solution date      2020-Nov-11 19:11:19   Additional Information  Earth MOID = 1.14368 au   Jupiter MOID = 2.59532 au   T_jup = 3.599  [ 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 17.8   n/a MPO471209   305626 (2009 AH41)          Discovered 2009-Jan-15 by Spacewatch at Kitt Peak Reference: 20111110/Numbers.arc Last Updated: 2011-11-14 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-20 18:07 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin