+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   29172 (1990 QL4) Classification: Main-belt Asteroid          SPK-ID: 2029172 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO257067 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.0108261 n/a   a 3.0041574 n/a AU q 2.9716341 n/a AU i 10.16559 n/a deg node 350.07531 n/a deg peri 253.29059 n/a deg M 222.75892 n/a deg tp 2457125.5435160 (2015-Apr-13.04351600) n/a JED period 1901.8770893 5.21 n/a n/a d yr n 0.18928668 n/a deg/d Q 3.0366807 n/a AU   Orbit Determination Parameters    # obs. used (total)      910      first obs. used      1990-??-??      last obs. used      2013-03-05      # oppositions      14      planetary ephem.      DE403      condition code      0      fit RMS      0.49      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.228  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.4 mag n/a PDS3 (MPO 16202)   29172 (1990 QL4)          Discovered 1990-Aug-23 by Holt, H. E. at Palomar (675) Reference: 20011002/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 QL4 = 2000 OB26  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-18 23:25 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin