+ View the NASA Portal + Near-Earth Object (NEO) Project Search JPL JPL Small-Body Database Browser Search: [ help ]   3805 Goldreich (1981 DK3) Classification: Main-belt Asteroid          SPK-ID: 2003805 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2455200.5 (2010-Jan-04.0) TDB Reference: MPO87239 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e 0.1889492 n/a   a 2.6830084 n/a AU q 2.1760561 n/a AU i 11.83846 n/a deg node 312.51168 n/a deg peri 63.75601 n/a deg M 3.87866 n/a deg tp 2455183.2053928 (2009-Dec-17.70539280) n/a JED period 1605.2086524 4.39 n/a n/a d yr n 0.22426991 n/a deg/d Q 3.1899607 n/a AU   Orbit Determination Parameters    # obs. used (total)      368      first obs. used      1981-??-??      last obs. used      2005-09-30      # oppositions      9      planetary ephem.      DE403      quality code      0      fit RMS      0.60      data source      MPC:mpn      producer      MPC   Additional Information  T_jup = 3.320  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 12.7 mag n/a PDS3 (MPC 28110)   diameter diameter 12.9 km n/a DASTCOM value unverified geometric albedo albedo 0.1165   0.025 EAR-A-5-DDR-ALBEDOS-V1.0:IMPS IMPS quality code 2: from the PDS IMPS singleton file 3805 Goldreich (1981 DK3)           Discovered 1981-Feb-28 by Bus, S. J. at Siding Spring (413) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1981 DK3 = 1978 NK7  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2010-Feb-10 08:16 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin