+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   48455 (1991 PK13) Classification: Main-belt Asteroid          SPK-ID: 2048455 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO233767 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.2103992 n/a   a 2.3496465 n/a AU q 1.8552828 n/a AU i 6.53154 n/a deg node 321.25104 n/a deg peri 14.19493 n/a deg M 3.33262 n/a deg tp 2456388.3217322 (2013-Apr-05.82173220) n/a JED period 1315.5344446 3.60 n/a n/a d yr n 0.27365304 n/a deg/d Q 2.8440102 n/a AU   Orbit Determination Parameters    # obs. used (total)      287      first obs. used      1991-??-??      last obs. used      2012-06-06      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.57      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.520  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 15.4 mag n/a MPO233767   48455 (1991 PK13)          Discovered 1991-Aug-05 by Holt, H. E. at Palomar (675) Reference: 20021120/Numbers.arc Last Updated: 2004-04-19 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-18 22:10 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin