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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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09485252894981336 1.587e-07  
a 5.219260961055528 2.2293e-07 AU
q 4.724200859650378 8.2069e-07 AU
i 7.242982731810242 1.2432e-05 deg
node 356.0246185484726 7.3314e-05 deg
peri 19.70725727553383 9.3782e-05 deg
M 149.583559523253 5.4368e-05 deg
tp 2454990.855331663555
(2009-Jun-08.35533166)
0.00064321 JED
period 4355.238521382076
11.92
0.00027904
7.64e-07
d
yr
n .08265907785132257 5.296e-09 deg/d
Q 5.714321062460678 2.4408e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      382  
   data-arc span      6385 days (17.48 yr)  
   first obs. used      1996-09-11  
   last obs. used      2014-03-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .55725  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Mar-22 11:01:49  

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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