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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 98 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06677334738627223 2.7327e-08  
a 5.2786680842057 5.5805e-08 au
q 4.926193746482205 1.7696e-07 au
i 21.76241413631756 1.1942e-06 deg
node 338.005081646165 3.2523e-06 deg
peri 80.72926870121303 2.3185e-05 deg
M 317.6174117889609 2.4673e-05 deg
tp 2459722.018757295118
(2022-May-22.51875730)		 0.00030674 TDB
period 4429.808573543916
12.13		 7.0247e-05
1.923e-07		 d
yr
n .0812676200389387 1.2887e-09 deg/d
Q 5.631142421929195 5.9532e-08 au
   Orbit Determination Parameters
   # obs. used (total)      2598  
   data-arc span      37218 days (101.90 yr)  
   first obs. used      1919-03-19  
   last obs. used      2021-02-09  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .39371  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 11:37:04  

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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