+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   172393 (2003 AK68) Classification: Outer Main-belt Asteroid          SPK-ID: 2172393 [ 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 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0731696038499325 5.485e-08   a 3.204325731598022 3.6268e-08 au q 2.96986648721085 1.8625e-07 au i 12.1343855446093 6.5378e-06 deg node 72.84570880710311 2.7054e-05 deg peri 46.51916014560032 5.418e-05 deg M 50.14978665628172 4.448e-05 deg tp 2458908.643075382010 (2020-Feb-29.14307538) 0.00025901 TDB period 2095.093516201741 5.74 3.557e-05 9.739e-08 d yr n .1718300387147658 2.9173e-09 deg/d Q 3.438784975985195 3.8922e-08 au   Orbit Determination Parameters    # obs. used (total)      354      data-arc span      7035 days (19.26 yr)      first obs. used      2001-10-20      last obs. used      2021-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54981      source      ORB      producer      Otto Matic      solution date      2021-Feb-23 22:18:19   Additional Information  Earth MOID = 2.001 au   Jupiter MOID = 1.78824 au   T_jup = 3.154  [ hide covariance matrix ] Orbital Elements at Epoch 2457571.5 (2016-Jul-02.0) TDB Reference: JPL 20 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .07412991070285586 5.4819e-08   q 2.965259217811811 1.8611e-07 au tp 2456818.155215192822 (2014-Jun-09.65521519) 0.00025913 TDB node 72.86633366538915 2.7052e-05 deg peri 47.22981034178213 5.3661e-05 deg i 12.13686403935292 6.5391e-06 deg   Orbit Determination Parameters    # obs. used (total)      354      data-arc span      7035 days (19.26 yr)      first obs. used      2001-10-20      last obs. used      2021-01-23      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .54981      source      ORB      producer      Otto Matic      solution date      2021-Feb-23 22:18:19   Additional Information  Jupiter MOID = 1.78824 au   T_jup = 3.154  Orbit Covariance (6×6)   e q tp node peri i e 3.005157792517757E-15 -1.004629628912978E-14 -5.668309795801338E-13 -5.021973339478816E-15 -1.345081501582142E-13 -1.791876721644804E-15 q -1.004629628912978E-14 3.463762790215842E-14 3.001811200623959E-13 1.614489473387306E-14 2.287343204001587E-13 8.239636696225662E-15 tp -5.668309795801338E-13 3.001811200623959E-13 6.714590576324961E-8 -7.122072162819201E-12 1.203544475214474E-8 -9.512512311539111E-12 node -5.021973339478816E-15 1.614489473387306E-14 -7.122072162819201E-12 7.318125306453461E-10 -7.162223100345239E-10 4.075236121450545E-12 peri -1.345081501582142E-13 2.287343204001587E-13 1.203544475214474E-8 -7.162223100345239E-10 2.879519931586031E-9 -5.417327557970511E-12 i -1.791876721644804E-15 8.239636696225662E-15 -9.512512311539111E-12 4.075236121450545E-12 -5.417327557970511E-12 4.27597847990502E-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 15.22   n/a E2021B55   172393 (2003 AK68)          Discovered 2003-Jan-08 by LINEAR at Socorro Reference: 20071224/Numbers.arc Last Updated: 2007-12-22 [ show close-approach data ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ] 2021-Mar-06 11:51 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin