+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   911 Agamemnon (1919 FD) Classification: Jupiter Trojan          SPK-ID: 2000911 [ 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 55 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .06742641357565803 6.9621e-08   a 5.268437856554095 7.8785e-08 AU q 4.913205986740425 3.7522e-07 AU i 21.77123747865417 1.061e-05 deg node 338.0378938002904 2.026e-05 deg peri 81.50158808412699 8.1601e-05 deg M 88.64963496209758 7.7035e-05 deg tp 2455312.833705867567 (2010-Apr-26.33370587) 0.0009451 JED period 4416.937148755193 12.09 9.9078e-05 2.713e-07 d yr n .0815044425301495 1.8282e-09 deg/d Q 5.623669726367764 8.4097e-08 AU   Orbit Determination Parameters    # obs. used (total)      1012      data-arc span      34290 days (93.88 yr)      first obs. used      1919-05-20      last obs. used      2013-04-06      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      0      fit RMS      .60303      data source      ORB      producer      Otto Matic      solution date      2013-Apr-29 12:39:51   Additional Information  Earth MOID = 4.00546 AU   T_jup = 2.852  [ 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 7.89 mag n/a IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18 diameter diameter 166.66 km 3.9 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18 rotation period rot_per 6.592 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) Published Reference List: [Stephens, R.D. (2009) Minor Planet Bul. 36, 59-62.] [Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.] [French, L.M.; Stephens, R.D.; Coley, D.R.; Megna, R.; Wasserman, L.H. (2012) Minor Planet Bul. 39, 183-187.] geometric albedo albedo 0.0444   0.002 IRAS-A-FPA-3-RDR-IMPS-V6.0 IRAS observations used: 18 B-V BV .760 mag .014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=1.96, mean=5.16, max.=8.36) deg. U-B UB .215 mag .021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.1 #obs=2; phase (min.=1.96, mean=5.16, max.=8.36) deg. Tholen spectral type spec_T D   n/a EAR-A-5-DDR-TAXONOMY-V4.0 used 2 color indices; used ground-based radiometric albedo 911 Agamemnon (1919 FD)          Discovered 1919-Mar-19 by Reinmuth, K. at Heidelberg (024) Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  1919 FD = 1937 QD  [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-23 13:37 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin