+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   42488 (1991 RN17) Classification: Main-belt Asteroid          SPK-ID: 2042488 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO235017 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2287204 n/a   a 2.3438511 n/a AU q 1.8077645 n/a AU i 9.60672 n/a deg node 177.29258 n/a deg peri 198.83206 n/a deg M 351.22626 n/a deg tp 2456432.4429998 (2013-May-19.94299980) n/a JED period 1310.6702429 3.59 n/a n/a d yr n 0.27466863 n/a deg/d Q 2.8799377 n/a AU   Orbit Determination Parameters    # obs. used (total)      508      first obs. used      1991-??-??      last obs. used      2012-07-19      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.56      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 14.8 mag n/a MPO235017   42488 (1991 RN17)          Discovered 1991-Sep-11 by Holt, H. E. at Palomar (675) Reference: 20020624/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1991 RN17 = 2000 CP45  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-26 02:14 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin