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JPL Small-Body Database Browser
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911 Agamemnon (A919 FB)
Classification: Jupiter Trojan          SPK-ID: 2000911
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 88 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06650282028508435 4.6067e-08  
a 5.278194957154006 7.0155e-08 au
q 4.927180106488755 2.7917e-07 au
i 21.76270193593425 6.2333e-06 deg
node 338.0053060381865 1.254e-05 deg
peri 80.63385068234052 5.3674e-05 deg
M 301.4260610154901 5.543e-05 deg
tp 2459721.156814598013
0.00068891 TDB
period 4429.213021236175
n .08127854728909052 1.6205e-09 deg/d
Q 5.629209807819257 7.4821e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1936  
   data-arc span      36788 days (100.72 yr)  
   first obs. used      1919-03-19  
   last obs. used      2019-12-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .44142  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-13 20:50:15  

Additional Information
 Earth MOID = 4.01871 au 
 Jupiter MOID = .110631 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 7.9   n/a MPO502161 IRAS observations used: 18
diameter diameter 131.038 km 1.195 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (  
rotation period rot_per 6.592 h n/a LCDB (Rev. 2019-August); 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] (  
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.DBLast Updated: 2003-08-29

Alternate Designations
 A919 FB = 1937 QD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
FirstGov 2020-Feb-19 23:34 UT
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