+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   266896 (2009 WR101) Classification: Main-belt Asteroid          SPK-ID: 2266896 [ 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 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1113819717870389 6.5391e-08   a 2.9820501947868 2.653e-08 au q 2.649903564123523 1.94e-07 au i 2.137224072913611 4.5637e-06 deg node 144.07864107016 0.00015449 deg peri 229.0432594835594 0.00015604 deg M 89.92747245590107 1.9689e-05 deg tp 2458730.648370652476 (2019-Sep-04.14837065) 0.00010322 TDB period 1880.922280430547 5.15 2.5101e-05 6.872e-08 d yr n .1913954679284225 2.5541e-09 deg/d Q 3.314196825450077 2.9485e-08 au   Orbit Determination Parameters    # obs. used (total)      297      data-arc span      7272 days (19.91 yr)      first obs. used      2001-02-20      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56973      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 14:15:20   Additional Information  Earth MOID = 1.64935 au   Jupiter MOID = 2.15008 au   T_jup = 3.248  [ hide covariance matrix ] Orbital Elements at Epoch 2457499.5 (2016-Apr-21.0) TDB Reference: JPL 17 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1107562383179568 6.6048e-08   q 2.652587386223187 1.9545e-07 au tp 2456836.496377050560 (2014-Jun-27.99637705) 0.00010853 TDB node 144.1665629419659 0.00015416 deg peri 226.8053489260789 0.00015572 deg i 2.137552434416196 4.5728e-06 deg   Orbit Determination Parameters    # obs. used (total)      297      data-arc span      7272 days (19.91 yr)      first obs. used      2001-02-20      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .56973      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 14:15:20   Additional Information  Jupiter MOID = 2.15008 au   T_jup = 3.248  Orbit Covariance (6×6)   e q tp node peri i e 4.362370866740606E-15 -1.281729861585328E-14 -1.928643013056083E-13 2.320974058185163E-14 -2.299015370369191E-13 -2.579187678448676E-15 q -1.281729861585328E-14 3.819928127872101E-14 -9.691316298365233E-14 -6.89557695989487E-14 5.85104435942454E-13 7.845722220537686E-15 tp -1.928643013056083E-13 -9.691316298365233E-14 1.177869758970584E-8 -1.21588812856548E-11 2.410386480651383E-9 -1.609843453189355E-12 node 2.320974058185163E-14 -6.89557695989487E-14 -1.21588812856548E-11 2.376421293557798E-8 -2.375100005461347E-8 2.070790303208746E-10 peri -2.299015370369191E-13 5.85104435942454E-13 2.410386480651383E-9 -2.375100005461347E-8 2.424806185388709E-8 -2.071548221497986E-10 i -2.579187678448676E-15 7.845722220537686E-15 -1.609843453189355E-12 2.070790303208746E-10 -2.071548221497986E-10 2.091005134122747E-11 [ 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 16.2   n/a MPO503217   266896 (2009 WR101)          Discovered 2001-Mar-20 by Sapcewatch at Kitt Peak Reference: 20110218/Numbers.arc Last Updated: 2011-02-22 [ show close-approach data ] Alternate Designations  2009 WR101 = 2006 BF59 = 2006 HZ129  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-01 11:32 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin