+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   227350 (2005 UJ81) Classification: Main-belt Asteroid          SPK-ID: 2227350 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1834620688995115 6.5831e-08   a 2.573187164447731 1.9884e-08 au q 2.101104923592483 1.773e-07 au i 7.582256153613173 6.5933e-06 deg node 239.9469375340078 4.1029e-05 deg peri 109.5578476523805 4.3363e-05 deg M 288.3290059766878 1.496e-05 deg tp 2459500.655577983079 (2021-Oct-13.15557798) 6.3753e-05 TDB period 1507.667216653381 4.13 1.7476e-05 4.785e-08 d yr n .2387794839759824 2.7677e-09 deg/d Q 3.045269405302979 2.3532e-08 au   Orbit Determination Parameters    # obs. used (total)      304      data-arc span      6735 days (18.44 yr)      first obs. used      2001-12-14      last obs. used      2020-05-23      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .50241      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 00:39:25   Additional Information  Earth MOID = 1.10845 au   Jupiter MOID = 2.45513 au   T_jup = 3.393  [ 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 16.86   n/a E2021B55   diameter diameter 3.005 km 0.705 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.041   0.019 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   227350 (2005 UJ81)          Discovered 2005-Oct-27 by Mt. Lemmon Survey at Mount Lemmon Reference: 20091202/Numbers.arc Last Updated: 2009-12-04 Alternate Designations  2005 UJ81 = 2001 XB145  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-17 03:45 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin