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4722 Agelaos (4271 T-3)
Classification: Jupiter Trojan          SPK-ID: 2004722
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 41 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1114030866845724 2.7599e-08  
a 5.205871728298889 6.9258e-08 au
q 4.625921548882443 1.5228e-07 au
i 8.816068296632128 1.9374e-06 deg
node 64.98043530216924 7.2119e-06 deg
peri 315.1251500801014 1.3184e-05 deg
M 225.0652663060739 1.3976e-05 deg
tp 2460826.647279174558
(2025-May-31.14727917)
0.00019274 TDB
period 4338.490205425829
11.88
8.6577e-05
2.37e-07
d
yr
n .08297817511487628 1.6559e-09 deg/d
Q 5.785821907715334 7.6973e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2541  
   data-arc span      15872 days (43.46 yr)  
   first obs. used      1977-10-07  
   last obs. used      2021-03-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .43291  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-03 21:48:17  

Additional Information
 Earth MOID = 3.63505 au 
 Jupiter MOID = .235348 au 
 T_jup = 2.964 
[ 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 10.16   n/a E2021B10  
diameter diameter 50.378 km 0.342 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  
rotation period rot_per 18.438 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Mottola, S.; Di Martino, M.; Erikson, A.; Gonano-Beurer, M.; et al. (2011) Astron. J. 141, A170.]
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
[Stephens, R.D.; Coley, D.R.; French, L.M. (2016) Minor Planet Bull. 43, 265-270.]
geometric albedo albedo 0.076   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[jupiter_trojans] (http://adsabs.harvard.edu/abs/2012ApJ...759...49G)  

4722 Agelaos (4271 T-3)          Discovered 1977-Oct-16 by van Houten and Gehrels at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 4271 T-3 = 1988 TZ2 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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