+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   1663 van den Bos (1926 PE) Classification: Main-belt Asteroid          SPK-ID: 2001663 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: MPO244188 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1794135 n/a   a 2.2399751 n/a AU q 1.8380933 n/a AU i 5.36410 n/a deg node 83.27227 n/a deg peri 274.86575 n/a deg M 283.05312 n/a deg tp 2456662.2289334 (2014-Jan-04.72893340) n/a JED period 1224.5124952 3.35 n/a n/a d yr n 0.29399455 n/a deg/d Q 2.6418569 n/a AU   Orbit Determination Parameters    # obs. used (total)      1149      first obs. used      1936-??-??      last obs. used      2012-06-18      # oppositions      24      planetary ephem.      DE403      condition code      0      fit RMS      0.52      data source      MPC:mpn      producer      MPCLINUX   Additional Information  T_jup = 3.608  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.20 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 diameter diameter 12.13 km 0.8 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 rotation period rot_per 740. h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Stephens, R.D.; Higgins, D. (2011) Minor Planet Bul. 38, 72.] [Stephens, R.D. (2011) Minor Planet Bul. 38, 165-166.] geometric albedo albedo 0.1584   0.024 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 3 1663 van den Bos (1926 PE)          Discovered 1926-Aug-04 by Wood, H. E. at Johannesburg (UO) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1926 PE = 1928 DD = 1936 OM = 1948 BE = 1948 EG1 = 1949 KE = 1950 XD = 1963 SC  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 07:39 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin