+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   452891 (2006 US61) Classification: Main-belt Asteroid          SPK-ID: 2452891 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2577178583472432 1.04e-07   a 2.66355292558264 1.1025e-08 au q 1.977107770006948 2.7957e-07 au i 12.84877560927474 1.1604e-05 deg node 239.2818947429876 1.9994e-05 deg peri 153.8085698687161 2.5744e-05 deg M 54.8675143411334 1.1451e-05 deg tp 2458758.506774596598 (2019-Oct-02.00677460) 5.0629e-05 TDB period 1587.780350383286 4.35 9.8582e-06 2.699e-08 d yr n .2267316130427594 1.4077e-09 deg/d Q 3.349998081158333 1.3866e-08 au   Orbit Determination Parameters    # obs. used (total)      370      data-arc span      4867 days (13.33 yr)      first obs. used      2006-10-19      last obs. used      2020-02-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45688      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 06:35:50   Additional Information  Earth MOID = .992766 au   Jupiter MOID = 2.11461 au   T_jup = 3.302  [ hide covariance matrix ] Orbital Elements at Epoch 2457416.5 (2016-Jan-29.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2565291825932403 1.0338e-07   q 1.980890091237342 2.7698e-07 au tp 2457164.969257351491 (2015-May-22.46925735) 5.2576e-05 TDB node 239.4673136000566 2.0111e-05 deg peri 152.8406331421086 2.5945e-05 deg i 12.80337396793658 1.1581e-05 deg   Orbit Determination Parameters    # obs. used (total)      370      data-arc span      4867 days (13.33 yr)      first obs. used      2006-10-19      last obs. used      2020-02-15      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .45688      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 06:35:50   Additional Information  Jupiter MOID = 2.11461 au   T_jup = 3.302  Orbit Covariance (6×6)   e q tp node peri i e 1.068809215370839E-14 -2.862386672123202E-14 2.019523558215788E-12 -1.720301891294947E-14 2.941069505879226E-13 -6.256538035263267E-14 q -2.862386672123202E-14 7.671801569417845E-14 -5.427995108972159E-12 4.715686077092161E-14 -7.89283506807239E-13 1.692891331389923E-13 tp 2.019523558215788E-12 -5.427995108972159E-12 2.764254482091198E-9 1.971676702853473E-12 8.494260586170272E-10 -7.031855040102021E-12 node -1.720301891294947E-14 4.715686077092161E-14 1.971676702853473E-12 4.044432813064083E-10 -3.926399827475688E-10 -4.939831738540244E-11 peri 2.941069505879226E-13 -7.89283506807239E-13 8.494260586170272E-10 -3.926399827475688E-10 6.7314516710969E-10 4.648722489996422E-11 i -6.256538035263267E-14 1.692891331389923E-13 -7.031855040102021E-12 -4.939831738540244E-11 4.648722489996422E-11 1.34122930556796E-10 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.3   n/a MPO503597   diameter diameter 1.836 km 0.486 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   geometric albedo albedo 0.190   0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)   452891 (2006 US61)          Discovered 2006-Oct-19 by CSS at Catalina Reference: Last Updated: 2016-01-04 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-25 02:22 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin