+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   11290 (1991 RA1) Classification: Main-belt Asteroid          SPK-ID: 2011290 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .2051718506849652 7.4149e-08   a 2.548793199993715 2.0895e-08 AU q 2.02585258213775 1.873e-07 AU i 11.80939738099301 1.185e-05 deg node 323.1857340321243 3.1813e-05 deg peri 49.80200818181903 4.8073e-05 deg M 98.30074872276239 3.47e-05 deg tp 2455994.660184845440 (2012-Mar-08.16018485) 0.00014111 JED period 1486.278948573362 4.07 1.8277e-05 5.004e-08 d yr n .2422156354603246 2.9785e-09 deg/d Q 3.07173381784968 2.5182e-08 AU   Orbit Determination Parameters    # obs. used (total)      870      data-arc span      13655 days (37.39 yr)      first obs. used      1975-11-27      last obs. used      2013-04-16      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .51009      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:43:56   Additional Information  Earth MOID = 1.04525 AU   T_jup = 3.382  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 13.9 mag n/a PDS3 (MPC 35563)   11290 (1991 RA1)          Discovered 1991-Sep-10 by Sugie, A. at Dynic (402) Reference: 19990831/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RA1 = 1975 WB = 1987 QL3  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-19 13:13 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin