+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   4230 van den Bergh (1973 ST1) Classification: Outer Main-belt Asteroid          SPK-ID: 2004230 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO250246 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1327003 n/a   a 3.9453829 n/a AU q 3.4218294 n/a AU i 3.09844 n/a deg node 160.56749 n/a deg peri 23.76940 n/a deg M 196.87324 n/a deg tp 2457697.5445197 (2016-Nov-05.04451970) n/a JED period 2862.4121945 7.84 n/a n/a d yr n 0.12576805 n/a deg/d Q 4.4689364 n/a AU   Orbit Determination Parameters    # obs. used (total)      1025      first obs. used      1951-??-??      last obs. used      2013-01-22      # oppositions      24      planetary ephem.      DE403      condition code      0      fit RMS      0.52      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.042   MPC Hilda  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 11.70 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 diameter diameter 37.75 km 2.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 geometric albedo albedo 0.0259   0.005 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 4230 van den Bergh (1973 ST1)          Discovered 1973-Sep-19 by van Houten and Gehrels at Palomar (675) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1973 ST1 = 1978 JB2 = 1979 OD  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-24 12:11 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin