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13387 Irus (1998 YW6)
Classification: Jupiter Trojan          SPK-ID: 2013387
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09550377154905688 1.239e-07  
a 5.21636931044181 1.7675e-07 au
q 4.718186367501865 6.7636e-07 au
i 7.242532869890883 1.086e-05 deg
node 356.0192397291159 5.7565e-05 deg
peri 18.98651468983374 7.2409e-05 deg
M 216.6263264740682 4.8024e-05 deg
tp 2459333.576908349100
(2021-Apr-29.07690835)
0.0006298 JED
period 4351.619594184637
11.91
0.00022118
6.056e-07
d
yr
n .08272781942637915 4.2048e-09 deg/d
Q 5.714552253381757 1.9363e-07 au
  Orbit Determination Parameters
   # obs. used (total)      456  
   data-arc span      7153 days (19.58 yr)  
   first obs. used      1996-09-11  
   last obs. used      2016-04-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5451  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:16:23  

Additional Information
 Earth MOID = 3.71876 au 
 Jupiter MOID = .21228 au 
 T_jup = 2.975 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.1 mag n/a MPO337372  

13387 Irus           Discovered 1998 Dec. 22 at Farra d´Isonzo.
The mythological Greek beggar Irus defied and, in the presence of Penelope's suitors, was defeated by Ulysses on his return to Ithaca.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030106/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1998 YW6 = 1996 RT28 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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