+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   187228 (2005 SC144) Classification: Main-belt Asteroid          SPK-ID: 2187228 [ 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 18 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0157133203485026 3.819e-08   a 2.856482730438922 1.6365e-08 au q 2.81159790222557 1.1072e-07 au i 3.664033153625749 4.3362e-06 deg node 78.7292846508404 6.4439e-05 deg peri 348.7016771591697 0.0001615 deg M .3043615755406175 0.00014627 deg tp 2459199.009152731893 (2020-Dec-15.50915273) 0.00071646 TDB period 1763.379676180675 4.83 1.5154e-05 4.149e-08 d yr n .2041534247347845 1.7545e-09 deg/d Q 2.901367558652274 1.6623e-08 au   Orbit Determination Parameters    # obs. used (total)      406      data-arc span      6506 days (17.81 yr)      first obs. used      2003-03-26      last obs. used      2021-01-16      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .55645      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 11:56:25   Additional Information  Earth MOID = 1.82418 au   Jupiter MOID = 2.1255 au   T_jup = 3.300  [ 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 16.2   n/a MPO449934   187228 (2005 SC144)          Discovered 2005-Sep-25 by Spacewatch at Kitt Peak Reference: 20080520/Numbers.arc Last Updated: 2008-05-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 01:19 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin