+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   23657 (1997 CB28) Classification: Main-belt Asteroid          SPK-ID: 2023657 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO240393 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1120502 n/a   a 2.3045845 n/a AU q 2.0463553 n/a AU i 5.59277 n/a deg node 129.87006 n/a deg peri 235.02759 n/a deg M 358.88940 n/a deg tp 2456404.4422354 (2013-Apr-21.94223540) n/a JED period 1277.8720761 3.50 n/a n/a d yr n 0.28171834 n/a deg/d Q 2.5628137 n/a AU   Orbit Determination Parameters    # obs. used (total)      677      first obs. used      1995-??-??      last obs. used      2012-09-02      # oppositions      12      planetary ephem.      DE403      condition code      0      fit RMS      0.56      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.574  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 14.5 mag n/a PDS3 (MPO 11155)   23657 (1997 CB28)          Discovered 1997-Feb-06 by Beijing Schmidt CCD Asteroid Program at Xinglong (327) Reference: 20010408/Numbers.arc Last Updated: 2004-04-19 Alternate Designations  1997 CB28 = 2000 AN73  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 11:07 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin