+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227589 (2006 AA20) Classification: Main-belt Asteroid          SPK-ID: 2227589 [ 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 23 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1712028817401777 5.9952e-08   a 2.667881935623502 2.2291e-08 au q 2.211132860102195 1.572e-07 au i 15.21243203318731 4.7133e-06 deg node 91.57120525144525 2.4984e-05 deg peri 304.0352629363922 2.9419e-05 deg M 210.2809186214645 2.0186e-05 deg tp 2459862.446651346781 (2022-Oct-09.94665135) 9.4625e-05 TDB period 1591.652795960885 4.36 1.9948e-05 5.461e-08 d yr n .2261799815346456 2.8347e-09 deg/d Q 3.124631011144809 2.6107e-08 au   Orbit Determination Parameters    # obs. used (total)      363      data-arc span      7213 days (19.75 yr)      first obs. used      2000-08-26      last obs. used      2020-05-26      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .55936      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 00:40:22   Additional Information  Earth MOID = 1.25678 au   Jupiter MOID = 2.34121 au   T_jup = 3.312  [ 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 15.63   n/a E2021B55   diameter diameter 1.903 km 0.610 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.308   0.153 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   227589 (2006 AA20)          Discovered 2006-Jan-05 by CSS at Catalina Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 Alternate Designations  2006 AA20 = 2000 SH371  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-17 17:00 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin