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164202 (2004 EW)
Classification: Aten [NEO, PHA]          SPK-ID: 2164202
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 74 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2789934273245699 3.4743e-07  
a .9879208607458809 7.683e-09 au
q .7122974338809483 3.4869e-07 au
i 4.669056766986063 8.0995e-06 deg
node 342.9109301094203 2.1537e-05 deg
peri 56.18403234047174 2.9751e-05 deg
M 311.348123423643 9.1017e-05 deg
tp 2459444.970640257361
(2021-Aug-18.47064026)
9.1216e-05 TDB
period 358.658940221224
0.98
4.1839e-06
1.145e-08
d
yr
n 1.003739094801174 1.1709e-08 deg/d
Q 1.263544287610813 9.8265e-09 au
  Orbit Determination Parameters
   # obs. used (total)      426  
   data-arc span      4823 days (13.20 yr)  
   first obs. used      2004-03-13  
   last obs. used      2017-05-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .50642  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 20:17:52  

Additional Information
 Earth MOID = .0237797 au 
 Jupiter MOID = 4.12764 au 
 T_jup = 6.101 
[ 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 20.8   n/a MPO264343  
rotation period rot_per 11.1 h n/a LCDB (Rev. 2020-October); 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:
[Hasegawa, S.; Kuroda, D.; Kitazato, K.; Kasuga, T.; et al. (2018) Pub. Astron. Soc. Japan 70, A114.]

164202 (2004 EW)          Discovered 2004-Mar-13 by CSS at Catalina
Reference: 20070926/Numbers.arcLast Updated: 2007-09-30

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