+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   21081 (1991 RC19) Classification: Main-belt Asteroid          SPK-ID: 2021081 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO257018 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2650910 n/a   a 2.5997190 n/a AU q 1.9105569 n/a AU i 3.71224 n/a deg node 299.78224 n/a deg peri 88.77607 n/a deg M 33.96279 n/a deg tp 2456256.0595315 (2012-Nov-24.55953150) n/a JED period 1531.0452599 4.19 n/a n/a d yr n 0.23513348 n/a deg/d Q 3.2888811 n/a AU   Orbit Determination Parameters    # obs. used (total)      460      first obs. used      1991-??-??      last obs. used      2013-03-07      # oppositions      11      planetary ephem.      DE403      condition code      0      fit RMS      0.52      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.362  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.3 mag n/a PDS3 (MPO 8636)   21081 (1991 RC19)          Discovered 1991-Sep-14 by Holt, H. E. at Palomar (675) Reference: 20010208/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RC19 = 2000 YZ62  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-25 12:48 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin