+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   27731 (1990 RK3) Classification: Main-belt Asteroid          SPK-ID: 2027731 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO257058 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2169482 n/a   a 2.3781348 n/a AU q 1.8622027 n/a AU i 1.20681 n/a deg node 249.59654 n/a deg peri 127.16625 n/a deg M 44.47132 n/a deg tp 2456235.0256657 (2012-Nov-03.52566570) n/a JED period 1339.5320925 3.67 n/a n/a d yr n 0.26875056 n/a deg/d Q 2.8940669 n/a AU   Orbit Determination Parameters    # obs. used (total)      519      first obs. used      1979-??-??      last obs. used      2013-03-14      # oppositions      13      planetary ephem.      DE403      condition code      0      fit RMS      0.48      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.508  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.8 mag n/a PDS3 (MPO 15147)   27731 (1990 RK3)          Discovered 1990-Sep-14 by Holt, H. E. at Palomar (675) Reference: 20010902/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1990 RK3 = 1979 SA6 = 2000 HH1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-21 16:21 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin