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144411 (2004 EW9)
Classification: Apollo [NEO]          SPK-ID: 2144411
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 233 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5337876109813334 4.6785e-09  
a 1.917804655024644 1.7638e-09 au
q .8941042898901591 9.6315e-09 au
i 8.78807335715894 2.6985e-06 deg
node 288.8419015422518 2.8504e-05 deg
peri 8.16130207005544 2.8881e-05 deg
M 345.9607775389229 1.8413e-06 deg
tp 2459038.330800803605
(2020-Jul-07.83080080)
5.0047e-06 TDB
period 970.0742563953091
2.66
1.3383e-06
3.664e-09
d
yr
n .3711056113763095 5.1196e-10 deg/d
Q 2.941505020159129 2.7053e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1864  
   # delay obs. used      3  
   # Doppler obs. used      1  
   data-arc span      6917 days (18.94 yr)  
   first obs. used      2001-03-14  
   last obs. used      2020-02-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .34666  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-21 05:14:46  

Additional Information
 Earth MOID = .0902717 au 
 Jupiter MOID = 2.30398 au 
 T_jup = 3.728 
[ 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 16.6   n/a MPO254119  
rotation period rot_per 49.94 h n/a LCDB (Rev. 2019-August); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2004) http://www.asu.cas.cz/~ppravec/neo.htm]

144411 (2004 EW9)          Discovered 2004-Mar-15 by NEAT at Palomar
Reference: 20061205/Numbers.arcLast Updated: 2006-12-13

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