+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   48474 (1991 UR) Classification: Main-belt Asteroid          SPK-ID: 2048474 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO253675 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1275410 n/a   a 2.3196403 n/a AU q 2.0237911 n/a AU i 6.92680 n/a deg node 10.55866 n/a deg peri 332.03174 n/a deg M 67.98911 n/a deg tp 2456156.7939899 (2012-Aug-17.29398990) n/a JED period 1290.4149448 3.53 n/a n/a d yr n 0.27898003 n/a deg/d Q 2.6154895 n/a AU   Orbit Determination Parameters    # obs. used (total)      829      first obs. used      1983-??-??      last obs. used      2013-02-06      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.54      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.558  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.2 mag n/a MPO253675   48474 (1991 UR)          Discovered 1991-Oct-18 by Ueda, S., Kaneda, H. at Kushiro (399) Reference: 20021120/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 UR = 1998 SD22  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 18:34 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin