+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   48446 (1990 RB1) Classification: Main-belt Asteroid          SPK-ID: 2048446 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO216852 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2109508 n/a   a 3.1677460 n/a AU q 2.4995074 n/a AU i 10.52316 n/a deg node 172.20745 n/a deg peri 151.07785 n/a deg M 23.05369 n/a deg tp 2456268.6251728 (2012-Dec-07.12517280) n/a JED period 2059.3205592 5.64 n/a n/a d yr n 0.17481494 n/a deg/d Q 3.8359846 n/a AU   Orbit Determination Parameters    # obs. used (total)      453      first obs. used      1990-??-??      last obs. used      2011-05-12      # oppositions      11      planetary ephem.      DE403      condition code      0      fit RMS      0.57      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.142  [ 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 MPO216852   48446 (1990 RB1)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar (675) Reference: 20021120/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 RB1 = 2000 GM161  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 14:53 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin