+ 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 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .007859390209849298 5.7099e-08   a 3.227858438550654 7.7435e-08 au q 3.20248943953993 2.1323e-07 au i 31.10375743945763 1.445e-05 deg node 224.7201923935857 1.2486e-05 deg peri 270.791823908721 0.0010532 deg M 65.27924489851064 0.0010532 deg tp 2458616.401361042248 (2019-May-12.90136104) 0.0062016 TDB period 2118.21552531386 5.80 7.6223e-05 2.087e-07 d yr n .1699543770205622 6.1157e-09 deg/d Q 3.253227437561379 7.8044e-08 au   Orbit Determination Parameters    # obs. used (total)      129      data-arc span      6235 days (17.07 yr)      first obs. used      2003-05-01      last obs. used      2020-05-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57144      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 08:52:19   Additional Information  Earth MOID = 2.21827 au   Jupiter MOID = 1.76237 au   T_jup = 2.961  [ hide covariance matrix ] Orbital Elements at Epoch 2457519.5 (2016-May-11.0) TDB Reference: JPL 15 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .009107248445501596 5.7172e-08   q 3.200052455216764 2.1337e-07 au tp 2456494.342758380232 (2013-Jul-20.84275838) 0.0053835 TDB node 224.7402739524824 1.2485e-05 deg peri 270.4856950208458 0.00090879 deg i 31.09957209095567 1.4448e-05 deg   Orbit Determination Parameters    # obs. used (total)      129      data-arc span      6235 days (17.07 yr)      first obs. used      2003-05-01      last obs. used      2020-05-26      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .57144      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 08:52:19   Additional Information  Jupiter MOID = 1.76237 au   T_jup = 2.961  Orbit Covariance (6×6)   e q tp node peri i e 3.268624533725808E-15 -1.141339836060493E-14 -4.157991544628686E-11 -5.698493421651594E-15 -7.192989223803811E-12 1.834424220644859E-14 q -1.141339836060493E-14 4.552553578371077E-14 -1.73669904059488E-11 -6.805166571356498E-15 -1.960435630292622E-12 -2.02173355340293E-14 tp -4.157991544628686E-11 -1.73669904059488E-11 2.898259734246966E-5 1.796952990585216E-9 4.891973168196222E-6 -6.141441726894158E-9 node -5.698493421651594E-15 -6.805166571356498E-15 1.796952990585216E-9 1.558824626375941E-10 1.692916673899008E-10 7.096707940751115E-11 peri -7.192989223803811E-12 -1.960435630292622E-12 4.891973168196222E-6 1.692916673899008E-10 8.258941096996571E-7 -1.097654569213015E-9 i 1.834424220644859E-14 -2.02173355340293E-14 -6.141441726894158E-9 7.096707940751115E-11 -1.097654569213015E-9 2.087577727833876E-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 ] 2021-Jan-23 15:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin