+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   58176 (1990 SN16) Classification: Main-belt Asteroid          SPK-ID: 2058176 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2171000516455251 9.3892e-08   a 2.297722786677065 1.4494e-08 AU q 1.798887051022374 2.1736e-07 AU i 4.111510562344122 8.3417e-06 deg node 28.05092130974467 9.9073e-05 deg peri 341.8026505600033 0.00010048 deg M 153.9341989041947 1.5064e-05 deg tp 2455856.526818769649 (2011-Oct-22.02681877) 5.1982e-05 JED period 1272.1691907125 3.48 1.2037e-05 3.296e-08 d yr n .2829812281481017 2.6775e-09 deg/d Q 2.796558522331756 1.764e-08 AU   Orbit Determination Parameters    # obs. used (total)      660      data-arc span      8234 days (22.54 yr)      first obs. used      1990-09-16      last obs. used      2013-04-02      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .58102      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 16:36:52   Additional Information  Earth MOID = .798569 AU   T_jup = 3.559  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.812 mag .57428 1 autocmod 2.5c 58176 (1990 SN16)          Discovered 1990-Sep-17 by Holt, H. E. at Palomar (675) Reference: 20030614/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 SN16 = 1995 AG3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 03:46 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin