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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.


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.DBLast Updated: 2003-08-29

Alternate Designations
 A919 FB = 1937 QD 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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