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382238 Euphemus (2012 SN9)
Classification: Jupiter Trojan          SPK-ID: 2382238
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07126832914197707 1.2503e-07  
a 5.121537620159527 3.8186e-07 au
q 4.75653419133298 9.1832e-07 au
i 12.44607400688698 8.0583e-06 deg
node 306.7729653147853 5.3336e-05 deg
peri 28.45882611537436 0.00011318 deg
M 253.9314086396717 0.00011201 deg
tp 2460247.835486450231
(2023-Oct-30.33548645)
0.0013961 TDB
period 4233.494282927123
11.59
0.00047348
1.296e-06
d
yr
n .0850361370397526 9.5105e-09 deg/d
Q 5.486541048986075 4.0908e-07 au
  Orbit Determination Parameters
   # obs. used (total)      135  
   data-arc span      6808 days (18.64 yr)  
   first obs. used      2001-09-29  
   last obs. used      2020-05-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56541  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:44:03  

Additional Information
 Earth MOID = 3.75161 au 
 Jupiter MOID = .135757 au 
 T_jup = 2.949 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.3   n/a MPO476790  

382238 Euphemus           Discovered 2011 July 8 by L. Elenin at Mayhill-ISON.
Euphemus, son of Troezenus, was a leader of the Thracian Cicones, and an ally of the Trojans. He was killed either by Achilles or by one of the following four: Diomedes, Idomeneus and the two Ajaxes.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2014-01-16Last Updated: 2014-01-21
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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