+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   6090 (1989 DJ) Classification: Jupiter Trojan          SPK-ID: 2006090 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 1 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .05733221710418011 8.3335e-08   a 5.315417322825008 1.7112e-07 AU q 5.010672662873485 4.599e-07 AU i 20.17890952177458 1.4073e-05 deg node 328.5334290682388 2.5469e-05 deg peri 74.31736513902182 0.00014393 deg M 90.59554362428757 0.0001352 deg tp 2455274.058058136502 (2010-Mar-18.55805814) 0.0016999 JED period 4476.148415783055 12.26 0.00021615 5.918e-07 d yr n .08042628763841421 3.8837e-09 deg/d Q 5.620161982776531 1.8093e-07 AU   Orbit Determination Parameters    # obs. used (total)      739      data-arc span      21551 days (59.00 yr)      first obs. used      1954-03-28      last obs. used      2013-03-29      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .5667      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 13:19:55   Additional Information  Earth MOID = 4.07908 AU   T_jup = 2.873  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 9.40 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 diameter diameter 74.53 km 6.2 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 rotation period rot_per 18.476 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so. Published Reference List: [Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.] [Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.] geometric albedo albedo 0.0553   0.011 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 9 6090 (1989 DJ)          Discovered 1989-Feb-27 by Debehogne, H. at La Silla (809) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1989 DJ = 1977 EH2 = 1983 OH = 1990 FO1  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-Jun-20 04:59 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin