+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   30839 (1991 GH1) Classification: Main-belt Asteroid          SPK-ID: 2030839 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO257079 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1364044 n/a   a 2.4319641 n/a AU q 2.1002335 n/a AU i 3.74956 n/a deg node 73.14231 n/a deg peri 83.67422 n/a deg M 325.79075 n/a deg tp 2456532.1361606 (2013-Aug-27.63616060) n/a JED period 1385.2691251 3.79 n/a n/a d yr n 0.25987730 n/a deg/d Q 2.7636947 n/a AU   Orbit Determination Parameters    # obs. used (total)      909      first obs. used      1991-??-??      last obs. used      2013-03-02      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.53      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.491  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.5 mag n/a PDS3 (MPO 18556)   30839 (1991 GH1)          Discovered 1991-Apr-11 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 20011130/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 GH1 = 1968 DA = 1999 LU25  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 23:47 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin