+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   266889 (2009 WW46) Classification: Main-belt Asteroid          SPK-ID: 2266889 [ 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 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05385138916764779 4.4447e-08   a 2.982361817195488 3.0429e-08 au q 2.82175749033896 1.336e-07 au i 10.17117293211555 4.9611e-06 deg node 90.791696132453 2.4578e-05 deg peri 165.9681463359525 5.4984e-05 deg M 209.9531303710733 5.2788e-05 deg tp 2459984.585389146620 (2023-Feb-09.08538915) 0.00028079 TDB period 1881.217120962621 5.15 2.8791e-05 7.883e-08 d yr n .1913654707840356 2.9288e-09 deg/d Q 3.142966144052015 3.2068e-08 au   Orbit Determination Parameters    # obs. used (total)      421      data-arc span      7297 days (19.98 yr)      first obs. used      2001-02-16      last obs. used      2021-02-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52196      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 03:17:38   Additional Information  Earth MOID = 1.80572 au   Jupiter MOID = 1.91478 au   T_jup = 3.233  [ hide covariance matrix ] Orbital Elements at Epoch 2457830.5 (2017-Mar-18.0) TDB Reference: JPL 22 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05562355633871429 4.4323e-08   q 2.817684350756124 1.3373e-07 au tp 2458101.153032435632 (2017-Dec-13.65303244) 0.00026258 TDB node 90.83363060813792 2.4606e-05 deg peri 165.3748576272935 5.3771e-05 deg i 10.16495229634139 4.9579e-06 deg   Orbit Determination Parameters    # obs. used (total)      421      data-arc span      7297 days (19.98 yr)      first obs. used      2001-02-16      last obs. used      2021-02-08      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .52196      source      ORB      producer      Otto Matic      solution date      2021-Apr-14 03:17:38   Additional Information  Jupiter MOID = 1.91478 au   T_jup = 3.233  Orbit Covariance (6×6)   e q tp node peri i e 1.964542120570581E-15 -5.786806497505494E-15 4.270710529378455E-13 1.185765391732637E-16 5.194040386450169E-14 2.654216511975675E-15 q -5.786806497505494E-15 1.788316912167355E-14 1.429741834319077E-12 -1.530240273438625E-15 3.167424024134045E-13 -7.546370721136719E-15 tp 4.270710529378455E-13 1.429741834319077E-12 6.894918637306201E-8 -2.535166478264417E-11 1.257532726497237E-8 -3.00165081827414E-12 node 1.185765391732637E-16 -1.530240273438625E-15 -2.535166478264417E-11 6.054545047485713E-10 -6.004294600702101E-10 -2.089328448679078E-11 peri 5.194040386450169E-14 3.167424024134045E-13 1.257532726497237E-8 -6.004294600702101E-10 2.891346034629391E-9 1.996495648545145E-11 i 2.654216511975675E-15 -7.546370721136719E-15 -3.00165081827414E-12 -2.089328448679078E-11 1.996495648545145E-11 2.458028376604934E-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 15.2   n/a MPO454983   266889 (2009 WW46)          Discovered 2009-Nov-18 by Mt. Lemmon Survey at Mount Lemmon Reference: 20110218/Numbers.arc Last Updated: 2011-02-22 [ show close-approach data ] Alternate Designations  2009 WW46 = 2006 DJ64  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Apr-20 08:54 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin