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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 74 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .278992315207128 3.4747e-07  
a .9879217743133085 7.7236e-09 au
q .7122991912541048 3.4875e-07 au
i 4.669002041173585 8.0994e-06 deg
node 342.9119482062643 2.1538e-05 deg
peri 56.19234202560317 2.9757e-05 deg
M 114.6014490123888 8.8843e-05 deg
tp 2459086.325302042753
(2020-Aug-24.82530204)
8.724e-05 TDB
period 358.6594377193752
0.98
4.206e-06
1.152e-08
d
yr
n 1.003737702510072 1.1771e-08 deg/d
Q 1.263544357372512 9.8785e-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 = .0235423 au 
 Jupiter MOID = 4.12684 au 
 T_jup = 6.101 
[ hide covariance matrix ]
Orbital Elements at Epoch 2453724.5 (2005-Dec-20.0) TDB
Reference: JPL 74 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .279886166134322 3.4354e-07  
q .71278730027363 3.4999e-07 au
tp 2453698.560803885683
(2005-Nov-24.06080389)
2.2558e-05 TDB
node 343.4778618588858 2.1344e-05 deg
peri 55.85039243392674 2.8963e-05 deg
i 4.663204207388561 8.114e-06 deg
  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
 Jupiter MOID = 4.12684 au 
 T_jup = 6.101 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.180219560418077E-13 -1.202342755328115E-13 5.342756185920724E-12 -6.441791182322915E-13 -4.478041803084875E-12 1.089896164840082E-12
q -1.202342755328115E-13 1.224903741787597E-13 -5.437244247285199E-12 6.551756625886764E-13 4.566669032681866E-12 -1.112434174467931E-12
tp 5.342756185920724E-12 -5.437244247285199E-12 5.088807380890346E-10 -7.767902192118497E-11 4.716394210700025E-11 1.794881674290533E-11
node -6.441791182322915E-13 6.551756625886764E-13 -7.767902192118497E-11 4.555753044850069E-10 -4.582694958271907E-10 3.220435543423229E-11
peri -4.478041803084875E-12 4.566669032681866E-12 4.716394210700025E-11 -4.582694958271907E-10 8.38866888389617E-10 -1.004444953130165E-10
i 1.089896164840082E-12 -1.112434174467931E-12 1.794881674290533E-11 3.220435543423229E-11 -1.004444953130165E-10 6.583674899073505E-11

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

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