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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.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 335 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5336549517031755 1.4255e-09  
a 1.917381825162576 3.4854e-10 au
q .8941615198588951 2.6297e-09 au
i 8.791705568144112 1.7658e-06 deg
node 288.8236996861485 6.4072e-06 deg
peri 8.170033900157939 6.3141e-06 deg
M 60.20576835602855 6.7882e-07 deg
tp 2459038.320133353424
(2020-Jul-07.82013335)
1.8452e-06 TDB
period 969.7534569695596
2.66
2.6442e-07
7.239e-10
d
yr
n .3712283750191368 1.0122e-10 deg/d
Q 2.940602130466257 5.3455e-10 au
  Orbit Determination Parameters
   # obs. used (total)      2363  
   # delay obs. used      7  
   # Doppler obs. used      1  
   data-arc span      7243 days (19.83 yr)  
   first obs. used      2001-03-14  
   last obs. used      2021-01-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .30293  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 18:52:22  

Additional Information
 Earth MOID = .0911513 au 
 Jupiter MOID = 2.30452 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 16.51   n/a E2021B55  
rotation period rot_per 49.94 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Published Reference List:
[Pravec, P.; Wolf, M.; Sarounova, L. (2004) http://www.asu.cas.cz/~ppravec/neo.htm]
[Behrend, R. (2020) Observatoire de Geneve web site, http://obswww.unige.ch/~behrend/page_cou.html]

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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