+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   413536 (2005 SQ121) Classification: Main-belt Asteroid          SPK-ID: 2413536 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB Reference: JPL 16 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .04029352838223569 8.8118e-08   a 2.688883428419193 2.9631e-08 au q 2.580538827679661 2.4766e-07 au i 5.265281541232291 6.4446e-06 deg node 222.709464377009 7.7577e-05 deg peri 122.8281223570665 0.00010607 deg M 138.9116047621362 7.0688e-05 deg tp 2458379.069712156145 (2018-Sep-17.56971216) 0.00031592 TDB period 1610.483904543927 4.41 2.6621e-05 7.288e-08 d yr n .2235352982940543 3.695e-09 deg/d Q 2.797228029158725 3.0825e-08 au   Orbit Determination Parameters    # obs. used (total)      214      data-arc span      5223 days (14.30 yr)      first obs. used      2005-09-01      last obs. used      2019-12-20      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .52985      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 13:26:40   Additional Information  Earth MOID = 1.57817 au   Jupiter MOID = 2.35787 au   T_jup = 3.366  [ 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 16.7   n/a MPO460570   413536 (2005 SQ121)          Discovered 2005-Sep-29 by Spacewatch at Kitt Peak Reference: Last Updated: 2014-11-10 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Jan-26 10:25 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin