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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09483630320330409 1.3474e-07  
a 5.218727258542031 1.8279e-07 AU
q 4.723802457915591 7.1727e-07 AU
i 7.243249645232567 1.1206e-05 deg
node 356.0245808400746 6.1093e-05 deg
peri 19.50261460795129 7.706e-05 deg
M 166.3612680536043 4.8061e-05 deg
tp 2454988.189243714830
(2009-Jun-05.68924371)
0.00054804 JED
period 4354.570512345681
11.92
0.00022878
6.264e-07
d
yr
n .08267175809402118 4.3434e-09 deg/d
Q 5.713652059168471 2.0012e-07 AU
  Orbit Determination Parameters
   # obs. used (total)      422  
   data-arc span      6774 days (18.55 yr)  
   first obs. used      1996-09-11  
   last obs. used      2015-03-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54846  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Apr-07 16:46:45  

Additional Information
 Earth MOID = 3.72576 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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