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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 94 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06650286036443387 4.5527e-08  
a 5.278194911995404 6.1911e-08 au
q 4.927179852786708 2.779e-07 au
i 21.7627058225596 5.9093e-06 deg
node 338.0053060657693 1.0781e-05 deg
peri 80.63383873510314 4.4923e-05 deg
M 301.4260809295118 4.4384e-05 deg
tp 2459721.156560339873
(2022-May-21.65656034)
0.00054968 TDB
period 4429.212964393712
12.13
7.7929e-05
2.134e-07
d
yr
n .08127854833218166 1.43e-09 deg/d
Q 5.629209971204099 6.6028e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2407  
   data-arc span      37133 days (101.66 yr)  
   first obs. used      1919-03-19  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40305  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:57:05  

Additional Information
 Earth MOID = 4.01871 au 
 Jupiter MOID = .110631 au 
 T_jup = 2.852 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456525.5 (2013-Aug-21.0) TDB
Reference: JPL 94 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06726081584427197 4.5317e-08  
q 4.914661443582595 2.7675e-07 au
tp 2455313.553215869587
(2010-Apr-27.05321587)
0.00052851 TDB
node 338.0377028043503 1.0781e-05 deg
peri 81.59423174572747 4.4677e-05 deg
i 21.76965936048822 5.9125e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      2407  
   data-arc span      37133 days (101.66 yr)  
   first obs. used      1919-03-19  
   last obs. used      2020-11-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40305  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 01:57:05  

Additional Information
 Jupiter MOID = .110631 au 
 T_jup = 2.852 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.053665160920335E-15 -1.23563775700111E-14 -7.204295677104405E-12 -5.235531284474197E-16 -6.095493816003856E-13 -7.979390248863329E-16
q -1.23563775700111E-14 7.65925328524618E-14 4.229766236963974E-11 8.012334404466745E-15 3.652566692869188E-12 7.990565204940731E-15
tp -7.204295677104405E-12 4.229766236963974E-11 2.79325793892377E-7 -5.29502751758777E-11 2.293195162217111E-8 3.391567659499129E-12
node -5.235531284474197E-16 8.012334404466745E-15 -5.29502751758777E-11 1.162278687825788E-10 -1.118193540676058E-10 9.996654879220729E-12
peri -6.095493816003856E-13 3.652566692869188E-12 2.293195162217111E-8 -1.118193540676058E-10 1.99604887642223E-9 -8.937607206219617E-12
i -7.979390248863329E-16 7.990565204940731E-15 3.391567659499129E-12 9.996654879220729E-12 -8.937607206219617E-12 3.495752703444888E-11

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] (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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