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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09485253285691625 1.5794e-07  
a 5.219260975073808 2.1559e-07 AU
q 4.724200851946798 8.2015e-07 AU
i 7.242982857402961 1.2375e-05 deg
node 356.0246213185534 6.7472e-05 deg
peri 19.70724938198375 8.6735e-05 deg
M 149.5835632224488 5.2198e-05 deg
tp 2454990.855279620393
(2009-Jun-08.35527962)
0.00060676 JED
period 4355.238538928512
11.92
0.00026985
7.388e-07
d
yr
n .08265907751830472 5.1215e-09 deg/d
Q 5.714321098200817 2.3604e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      400  
   data-arc span      6416 days (17.57 yr)  
   first obs. used      1996-09-11  
   last obs. used      2014-04-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55105  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:03:49  

Additional Information
 Earth MOID = 3.72491 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 12.0 mag n/a MPO253458  

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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