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30942 Helicaon (1994 CX13)
Classification: Jupiter Trojan          SPK-ID: 2030942
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06865378731036739 7.2959e-08  
a 5.17704804986944 1.3784e-07 au
q 4.821624094158151 3.5421e-07 au
i 22.89706462020587 9.479e-06 deg
node 143.6291656937095 1.9512e-05 deg
peri 271.1419549359576 8.9219e-05 deg
M 76.34103234104937 8.1837e-05 deg
tp 2456688.116866218417
(2014-Jan-30.61686622)
0.00097846 JED
period 4302.50833777047
11.78
0.00017183
4.704e-07
d
yr
n .08367212140872909 3.3417e-09 deg/d
Q 5.532472005580729 1.473e-07 au
  Orbit Determination Parameters
   # obs. used (total)      656  
   data-arc span      8107 days (22.20 yr)  
   first obs. used      1994-02-08  
   last obs. used      2016-04-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56623  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:57:06  

Additional Information
 Earth MOID = 3.92836 au 
 Jupiter MOID = .109254 au 
 T_jup = 2.838 
[ 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 11.3 mag n/a MPO279838  
rotation period rot_per 44.77 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Stephens, R.D.; Coley, D.R.; French, L.M. (2015) Minor Planet Bul. 42, 216-224.]

30942 Helicaon           Discovered 1994 Feb. 8 by E. W. Elst at the European Southern Observatory.
Helicaon, a Trojan warrior, was the son of Antenor and the husband of Laodice, daughter of Priamos, king of Troy.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100726/MPCPages.arcLast Updated: 2010-07-28

Alternate Designations
 1994 CX13 = 1999 RH51 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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