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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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09483628581484989 1.3081e-07  
a 5.218727242874401 1.8045e-07 AU
q 4.723802534479421 7.0302e-07 AU
i 7.243249064267364 1.1103e-05 deg
node 356.0245880349421 5.8507e-05 deg
peri 19.50261418397099 7.3846e-05 deg
M 166.3612635957888 4.7331e-05 deg
tp 2454988.189306698717
(2009-Jun-05.68930670)
0.00053522 JED
period 4354.570492735785
11.92
0.00022585
6.183e-07
d
yr
n .08267175846631612 4.2878e-09 deg/d
Q 5.713651951269381 1.9756e-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 = 3.72576 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 12.1 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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