+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   16477 (1990 QH5) Classification: Main-belt Asteroid          SPK-ID: 2016477 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250375 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0801035 n/a   a 2.1911660 n/a AU q 2.0156459 n/a AU i 3.71628 n/a deg node 25.56653 n/a deg peri 322.12885 n/a deg M 346.40630 n/a deg tp 2456445.2349056 (2013-Jun-01.73490560) n/a JED period 1184.7080647 3.24 n/a n/a d yr n 0.30387233 n/a deg/d Q 2.3666861 n/a AU   Orbit Determination Parameters    # obs. used (total)      755      first obs. used      1990-??-??      last obs. used      2012-07-19      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.60      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.666  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.9 mag n/a PDS3 (MPO 2845)   16477 (1990 QH5)          Discovered 1990-Aug-25 by Holt, H. E. at Palomar (675) Reference: 20000913/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 QH5 = 1999 JH20  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-22 23:53 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin