+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   441815 (2009 KU23) Classification: Outer Main-belt Asteroid          SPK-ID: 2441815 [ 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 .007859403381712583 6.4587e-08   a 3.227858425210194 8.3882e-08 au q 3.202489383787407 2.4942e-07 au i 31.10376094678282 1.61e-05 deg node 224.7201950140074 1.3824e-05 deg peri 270.7914770771274 0.0012952 deg M 65.27959289415318 0.0012996 deg tp 2458616.399315840728 (2019-May-12.89931584) 0.0076474 TDB period 2118.215512182257 5.80 8.2569e-05 2.261e-07 d yr n .1699543780741724 6.6249e-09 deg/d Q 3.25322746663298 8.4541e-08 au   Orbit Determination Parameters    # obs. used (total)      121      data-arc span      6203 days (16.98 yr)      first obs. used      2003-05-01      last obs. used      2020-04-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58295      source      ORB      producer      Otto Matic      solution date      2020-May-22 03:53:21   Additional Information  Earth MOID = 2.21827 au   Jupiter MOID = 1.76237 au   T_jup = 2.961  [ hide covariance matrix ] Orbital Elements at Epoch 2457403.5 (2016-Jan-16.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .009214517185429439 6.5175e-08   q 3.199343893637497 2.5111e-07 au tp 2456493.067051388321 (2013-Jul-19.56705139) 0.0065283 TDB node 224.7438765975817 1.3823e-05 deg peri 270.2390227972384 0.0011037 deg i 31.10009820367515 1.6098e-05 deg   Orbit Determination Parameters    # obs. used (total)      121      data-arc span      6203 days (16.98 yr)      first obs. used      2003-05-01      last obs. used      2020-04-24      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .58295      source      ORB      producer      Otto Matic      solution date      2020-May-22 03:53:21   Additional Information  Jupiter MOID = 1.76237 au   T_jup = 2.961  Orbit Covariance (6×6)   e q tp node peri i e 4.247726301943736E-15 -1.555070279382493E-14 -1.61508445899934E-10 -5.545492326971083E-15 -2.751654978211336E-11 4.663249555334252E-14 q -1.555070279382493E-14 6.305576045306539E-14 4.920328263696147E-10 1.470068981977725E-15 8.435482627702577E-11 -1.289774886132193E-13 tp -1.61508445899934E-10 4.920328263696147E-10 4.26191064315419E-5 5.454125666851121E-10 7.204891878324915E-6 -1.082027070522915E-8 node -5.545492326971083E-15 1.470068981977725E-15 5.454125666851121E-10 1.910830983708619E-10 -7.196198104838049E-11 1.127642076069423E-10 peri -2.751654978211336E-11 8.435482627702577E-11 7.204891878324915E-6 -7.196198104838049E-11 1.218216495021445E-6 -1.925401021018059E-9 i 4.663249555334252E-14 -1.289774886132193E-13 -1.082027070522915E-8 1.127642076069423E-10 -1.925401021018059E-9 2.591611189888438E-10 [ 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 15.4   n/a MPO437717   441815 (2009 KU23)          Discovered 2009-Apr-30 by Spacewatch at Kitt Peak Reference: Last Updated: 2015-09-02 [ show close-approach data ] Alternate Designations  2009 KU23 = 2015 MH55  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2020-Aug-11 19:48 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin