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JPL Small-Body Database Browser
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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 73 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2791241125739102 3.2763e-07  
a .9881856140605603 9.3692e-09 au
q .7123591814776019 3.3044e-07 au
i 4.669508025335079 8.0726e-06 deg
node 342.9208395351508 2.0182e-05 deg
peri 56.1673756148268 2.8158e-05 deg
M 273.8951550202319 8.2218e-05 deg
tp 2459086.318576414554
(2020-Aug-24.81857641)
8.3124e-05 TDB
period 358.8031256138795
0.98
5.1028e-06
1.397e-08
d
yr
n 1.003335741248276 1.4269e-08 deg/d
Q 1.264012046643519 1.1984e-08 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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52012  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-May-28 06:20:23  

Additional Information
 Earth MOID = .0236949 au 
 Jupiter MOID = 4.12604 au 
 T_jup = 6.100 
[ 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. 2019-August); 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

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