+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   175749 (1998 QN90) Classification: Main-belt Asteroid          SPK-ID: 2175749 [ 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 .2749859188451649 3.1775e-08   a 2.667025485880275 1.421e-08 au q 1.933631032062015 8.2259e-08 au i 11.80614324185119 6.1207e-06 deg node 250.373541358762 2.1331e-05 deg peri 69.91445354039186 2.6432e-05 deg M 59.8050741392976 1.3651e-05 deg tp 2458936.213665301459 (2020-Mar-27.71366530) 5.9122e-05 TDB period 1590.886423280207 4.36 1.2715e-05 3.481e-08 d yr n .2262889385011693 1.8086e-09 deg/d Q 3.400419939698535 1.8118e-08 au   Orbit Determination Parameters    # obs. used (total)      459      data-arc span      8183 days (22.40 yr)      first obs. used      1998-08-24      last obs. used      2021-01-18      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .53976      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 11:33:43   Additional Information  Earth MOID = .95581 au   Jupiter MOID = 2.05743 au   T_jup = 3.299  [ 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 15.96   n/a E2021B55   175749 (1998 QN90)          Discovered 1998-Aug-24 by LINEAR at Socorro Reference: 20080221/Numbers.arc Last Updated: 2008-02-22 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-13 07:53 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin