+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   18909 (2000 OE21) Classification: Main-belt Asteroid          SPK-ID: 2018909 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 26 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1864040681730216 3.7057e-08   a 3.139092557496001 1.6282e-08 au q 2.553952934407091 1.1581e-07 au i 6.100810376995809 3.7014e-06 deg node 182.3113603815744 3.4763e-05 deg peri 234.6742089032846 3.5754e-05 deg M 202.2958176934225 9.504e-06 deg tp 2460090.408426132118 (2023-May-25.90842613) 5.7257e-05 TDB period 2031.442849022023 5.56 1.5805e-05 4.327e-08 d yr n .177213944351578 1.3788e-09 deg/d Q 3.72423218058491 1.9317e-08 au   Orbit Determination Parameters    # obs. used (total)      1525      data-arc span      11273 days (30.86 yr)      first obs. used      1989-10-25      last obs. used      2020-09-05      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .48557      source      ORB      producer      Otto Matic      solution date      2020-Nov-13 02:11:59   Additional Information  Earth MOID = 1.57091 au   Jupiter MOID = 1.67931 au   T_jup = 3.175  [ 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 13.66   n/a E2021B10   diameter diameter 10.005 km 0.398 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.049   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   18909 (2000 OE21)          Discovered 2000-Jul-31 by LINEAR at Socorro Reference: 20001111/Numbers.arc Last Updated: 2004-04-19 [ show close-approach data ] Alternate Designations  2000 OE21 = 1989 UY4 = 2000 RN65  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-10 13:10 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin