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3838 Epona (1986 WA)
Classification: Apollo [NEO]          SPK-ID: 2003838
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 108 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7024659637985344 8.6813e-08  
a 1.504946451227975 5.4662e-09 au
q .4477727919009314 1.3102e-07 au
i 29.2088585485958 1.0602e-05 deg
node 235.5076850138964 1.0692e-05 deg
peri 49.68322863572978 1.1419e-05 deg
M 238.0685106117653 1.1863e-05 deg
tp 2458828.898567456342
(2019-Dec-11.39856746)		 2.3181e-05 TDB
period 674.3416708581342
1.85		 3.674e-06
1.006e-08		 d
yr
n .5338540024404567 2.9086e-09 deg/d
Q 2.562120110555018 9.3061e-09 au
   Orbit Determination Parameters
   # obs. used (total)      666  
   data-arc span      11755 days (32.18 yr)  
   first obs. used      1986-11-30  
   last obs. used      2019-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48184  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Feb-07 07:17:41  

Additional Information
 Earth MOID = .159766 au 
 Jupiter MOID = 2.88624 au 
 T_jup = 4.126 
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[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.6   n/a MPO319132  
rotation period rot_per 2.3812 h n/a LCDB (Rev. 2019-January); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (1999) http://www.asu.cas.cz/~ppravec/neo.htm]
[Skiff, B.A. (2011) Posting on CALL web site. http://www.minorplanet.info/call.html]

3838 Epona (1986 WA)          Discovered 1986-Nov-27 by Maury, A. at Palomar
Reference: DISCOVERY.DBLast Updated: 2003-08-29

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[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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