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JPL Small-Body Database Browser
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22222 Hodios (3156 T-2)
Classification: Jupiter Trojan          SPK-ID: 2022222
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .0436793216715114 5.2289e-08  
a 5.073038587385443 1.2084e-07 au
q 4.851451703075044 3.1804e-07 au
i 2.402631949826532 5.8259e-06 deg
node 48.86598671208178 0.00015085 deg
peri 25.1644528961084 0.00017508 deg
M 244.3311171114194 9.2309e-05 deg
tp 2459941.456580856023
(2022-Dec-27.95658086)
0.0010988 TDB
period 4173.502475797034
11.43
0.00014912
4.083e-07
d
yr
n .0862584848308372 3.0821e-09 deg/d
Q 5.294625471695841 1.2612e-07 au
  Orbit Determination Parameters
   # obs. used (total)      614  
   data-arc span      16782 days (45.95 yr)  
   first obs. used      1973-09-25  
   last obs. used      2019-09-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56471  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:31:44  

Additional Information
 Earth MOID = 3.86632 au 
 Jupiter MOID = .00516908 au 
 T_jup = 2.997 
[ 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 12.4   n/a MPO452483  

22222 Hodios           Discovered 1973 Sept. 30 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
The Greek herald Hodios went together with the other Greek herald Eurybates and Odysseus and Phoenix to Achilles to persuade Achilles to stop his quarrel with Agamemnon and fight the Trojans again.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010705/MPCPages.arcLast Updated: 2009-05-11

Alternate Designations
 3156 T-2 = 1998 SJ146 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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