+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   190923 (2001 UD158) Classification: Main-belt Asteroid          SPK-ID: 2190923 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 14 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .1718556389675921 3.6905e-08   a 2.388204144855135 9.2872e-09 au q 1.977777795556005 8.995e-08 au i 1.391663852723368 5.3932e-06 deg node 155.754795330775 0.00017086 deg peri 269.4506312094037 0.00017202 deg M 54.84510206655557 1.9832e-05 deg tp 2458995.128135107093 (2020-May-25.62813511) 7.3555e-05 TDB period 1348.048751404022 3.69 7.8634e-06 2.153e-08 d yr n .2670526563857963 1.5578e-09 deg/d Q 2.798630494154267 1.0883e-08 au   Orbit Determination Parameters    # obs. used (total)      433      data-arc span      11043 days (30.23 yr)      first obs. used      1990-12-18      last obs. used      2021-03-13      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .57133      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 22:09:40   Additional Information  Earth MOID = .991309 au   Jupiter MOID = 2.50261 au   T_jup = 3.513  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 16.8   n/a MPO494055   190923 (2001 UD158)          Discovered 2001-Oct-23 by LINEAR at Socorro Reference: 20080917/Numbers.arc Last Updated: 2008-09-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-21 09:34 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin