+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   180996 (2005 NT23) Classification: Main-belt Asteroid          SPK-ID: 2180996 [ 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 .06508371270799011 5.53e-08   a 2.848052272156828 2.0419e-08 au q 2.662690456298435 1.5202e-07 au i 6.255401876644889 6.3973e-06 deg node 200.68460970099 3.9405e-05 deg peri 131.9094240059676 6.1192e-05 deg M 52.24244129747294 4.4658e-05 deg tp 2458945.734085077318 (2020-Apr-06.23408508) 0.00021734 TDB period 1755.57893341791 4.81 1.888e-05 5.169e-08 d yr n .2050605604494931 2.2053e-09 deg/d Q 3.033414088015222 2.1748e-08 au   Orbit Determination Parameters    # obs. used (total)      340      data-arc span      8862 days (24.26 yr)      first obs. used      1996-10-07      last obs. used      2021-01-11      planetary ephem.      DE441      SB-pert. ephem.      SB441-N16      condition code      0      norm. resid. RMS      .56173      source      ORB      producer      Otto Matic      solution date      2021-Apr-13 21:28:48   Additional Information  Earth MOID = 1.65602 au   Jupiter MOID = 2.20631 au   T_jup = 3.295  [ 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 16.05   n/a E2021B55   180996 (2005 NT23)          Discovered 2005-Jul-04 by Spacewatch at Kitt Peak Reference: 20080321/Numbers.arc Last Updated: 2008-03-26 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Apr-23 12:28 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin