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26057 Ankaios (4742 T-2)
Classification: Jupiter Trojan          SPK-ID: 2026057
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1100088549506696 4.7935e-08  
a 5.19682513885993 1.1309e-07 au
q 4.625128355955095 3.2653e-07 au
i 7.291485767932696 6.1673e-06 deg
node 164.2607565063156 3.0884e-05 deg
peri 269.1402680997312 4.4053e-05 deg
M 272.2605064776431 3.441e-05 deg
tp 2460055.125347713021
(2023-Apr-20.62534771)
0.00043463 TDB
period 4327.18619557503
11.85
0.00014125
3.867e-07
d
yr
n .08319494094525795 2.7157e-09 deg/d
Q 5.768521921764767 1.2553e-07 au
  Orbit Determination Parameters
   # obs. used (total)      760  
   data-arc span      17188 days (47.06 yr)  
   first obs. used      1973-09-29  
   last obs. used      2020-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56707  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-13 01:31:07  

Additional Information
 Earth MOID = 3.65012 au 
 Jupiter MOID = .0502993 au 
 T_jup = 2.972 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.2   n/a MPO412370  

26057 Ankaios           Discovered 1973 Sept. 30 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Ankaios was the father of hero Agapenor from Arkadie.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030318/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 4742 T-2 = 1998 UQ28 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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