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JPL Small-Body Database Browser
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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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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 109 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .7025010079478672 8.6275e-08  
a 1.50495041462628 5.4849e-09 au
q .4477212314397575 1.3022e-07 au
i 29.20776351395789 1.0521e-05 deg
node 235.5031876715469 1.068e-05 deg
peri 49.69521695924333 1.1385e-05 deg
M 91.61070180184598 1.2727e-05 deg
tp 2458828.896783990393
(2019-Dec-11.39678399)
2.31e-05 TDB
period 674.3443347599552
1.85
3.6865e-06
1.009e-08
d
yr
n .5338518935258029 2.9185e-09 deg/d
Q 2.562179597812801 9.338e-09 au
  Orbit Determination Parameters
   # obs. used (total)      669  
   data-arc span      12140 days (33.24 yr)  
   first obs. used      1986-11-30  
   last obs. used      2020-02-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49628  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-27 10:10:24  

Additional Information
 Earth MOID = .159811 au 
 Jupiter MOID = 2.88774 au 
 T_jup = 4.126 
[ show covariance matrix ]

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-August); 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]
[Skiff, B.A.; McLelland, K.P.; Sanborn, J.; Pravec, P.; Koehn, B.W. (2019). Minor Planet Bull. 46-4, in press.]

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

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