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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09516371440774002 1.3105e-07  
a 5.217315324185241 1.7929e-07 au
q 4.720816218699352 7.0452e-07 au
i 7.243104201636055 1.1103e-05 deg
node 356.0236128539337 5.8515e-05 deg
peri 19.11438601128435 7.3735e-05 deg
M 199.9084810311653 4.7964e-05 deg
tp 2459336.185868523283
(2021-May-01.68586852)
0.00063311 JED
period 4352.803428669061
11.92
0.00022437
6.143e-07
d
yr
n .0827053198931328 4.2631e-09 deg/d
Q 5.713814429671131 1.9635e-07 au
  Orbit Determination Parameters
   # obs. used (total)      452  
   data-arc span      6817 days (18.66 yr)  
   first obs. used      1996-09-11  
   last obs. used      2015-05-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54318  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:17:44  

Additional Information
 Earth MOID = 3.72095 au 
 Jupiter MOID = .209753 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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