+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   30853 (1991 UH3) Classification: Main-belt Asteroid          SPK-ID: 2030853 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO231626 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2834307 n/a   a 2.8612481 n/a AU q 2.0502825 n/a AU i 8.60714 n/a deg node 23.09558 n/a deg peri 65.18495 n/a deg M 134.12358 n/a deg tp 2455741.8808888 (2011-Jun-29.38088880) n/a JED period 1767.7941494 4.84 n/a n/a d yr n 0.20364362 n/a deg/d Q 3.6722137 n/a AU   Orbit Determination Parameters    # obs. used (total)      525      first obs. used      1991-??-??      last obs. used      2012-05-20      # oppositions      10      planetary ephem.      DE403      condition code      0      fit RMS      0.57      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.225  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.7 mag n/a PDS3 (MPO 18561)   30853 (1991 UH3)          Discovered 1991-Oct-31 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 20011130/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 UH3 = 1998 HG80  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 15:11 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin