+ View the NASA Portal + Center for Near-Earth Object Studies JPL Small-Body Database Browser Search: [ help ]   911 Agamemnon (A919 FB) Classification: Jupiter Trojan          SPK-ID: 2000911 [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 96 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .0667732816153713 4.5462e-08   a 5.278668129604346 6.089e-08 au q 4.926194136032189 2.7763e-07 au i 21.76241922486138 5.785e-06 deg node 338.0050873333975 1.051e-05 deg peri 80.72927373634407 4.3711e-05 deg M 317.6173960472285 4.2929e-05 deg tp 2459722.018957725416 (2022-May-22.51895773) 0.00053057 TDB period 4429.80863069109 12.13 7.6647e-05 2.098e-07 d yr n .08126761899053792 1.4061e-09 deg/d Q 5.631142123176502 6.4956e-08 au   Orbit Determination Parameters    # obs. used (total)      2546      data-arc span      37199 days (101.85 yr)      first obs. used      1919-03-19      last obs. used      2021-01-21      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      0      norm. resid. RMS      .3934      source      ORB      producer      Otto Matic      solution date      2021-Feb-24 00:50:51   Additional Information  Earth MOID = 4.01704 au   Jupiter MOID = .111374 au   T_jup = 2.852  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 7.97   n/a E2021B10 IRAS observations used: 18 diameter diameter 131.038 km 1.195 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   rotation period rot_per 6.592 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List: [Stephens, R.D. (2009) Minor Planet Bull. 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 Bull. 39, 183-187.] [Stephens, R.D.; Coley, D.R.; French, L.M. (2014) Minor Planet Bull. 41, 210-212.] geometric albedo albedo 0.072   0.010 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)   B-V BV 0.760   0.014 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #obs=2; phase (min.=1.96, mean=5.16, max.=8.36) deg. U-B UB 0.215   0.021 EAR-A-5-DDR-UBV-MEAN-VALUES-V1.2 #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 (A919 FB)          Discovered 1919-Mar-19 by Reinmuth, K. at Heidelberg Reference: DISCOVERY.DB Last Updated: 2003-08-29 Alternate Designations  A919 FB = 1937 QD  [ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ] 2021-Mar-07 21:31 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin