+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   85429 (1997 AJ18) Classification: Main-belt Asteroid          SPK-ID: 2085429 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05716637165449832 7.6639e-08   a 2.965922390320092 2.9209e-08 au q 2.796371368656656 2.2789e-07 au i 9.815864818242833 5.0366e-06 deg node 271.6315855124947 6.7181e-05 deg peri 13.89919306032383 0.00014596 deg M 43.07794528468807 0.00012783 deg tp 2458777.250456091775 (2019-Oct-20.75045609) 0.00066395 TDB period 1865.684058880317 5.11 2.7561e-05 7.546e-08 d yr n .1929587157517187 2.8505e-09 deg/d Q 3.135473411983529 3.0879e-08 au   Orbit Determination Parameters    # obs. used (total)      568      data-arc span      8705 days (23.83 yr)      first obs. used      1997-01-15      last obs. used      2020-11-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .50055      source      ORB      producer      Otto Matic      solution date      2020-Dec-17 22:14:18   Additional Information  Earth MOID = 1.78094 au   Jupiter MOID = 1.98267 au   T_jup = 3.240  [ 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 14.9   n/a MPO351440   diameter diameter 3.467 km 0.564 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.212   0.042 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   85429 (1997 AJ18)          Discovered 1997-Jan-15 by Klet at Klet Reference: 20040830/Numbers.arc Last Updated: 2004-09-06 [ show close-approach data ] Alternate Designations  1997 AJ18 = 2002 AU54  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Jan-17 23:24 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin