+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   392648 (2011 UB144) Classification: Main-belt Asteroid          SPK-ID: 2392648 [ 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 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06748606424513953 7.7168e-08   a 2.916855515396174 3.9111e-08 au q 2.720008416690358 2.3474e-07 au i 12.08772634853773 8.548e-06 deg node 15.37989562217008 2.9245e-05 deg peri 354.8863218867812 5.8225e-05 deg M 288.5095590735352 5.244e-05 deg tp 2459361.840197393775 (2021-May-27.34019739) 0.00026675 TDB period 1819.578525128443 4.98 3.6597e-05 1.002e-07 d yr n .197848015366409 3.9793e-09 deg/d Q 3.11370261410199 4.175e-08 au   Orbit Determination Parameters    # obs. used (total)      165      data-arc span      6327 days (17.32 yr)      first obs. used      2003-02-01      last obs. used      2020-05-29      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .61475      source      ORB      producer      Otto Matic      solution date      2020-Jun-24 06:55:46   Additional Information  Earth MOID = 1.72016 au   Jupiter MOID = 2.23493 au   T_jup = 3.245  [ 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 16.3   n/a MPO437607   diameter diameter 3.272 km 0.720 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.055   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   392648 (2011 UB144)          Discovered 2006-Oct-04 by Mt. Lemmon Survey at Mount Lemmon Reference: Last Updated: 2014-04-17 [ show close-approach data ] Alternate Designations  2011 UB144 = 2010 HM28  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Jul-12 19:14 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin