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90500 (2004 EG4)
Classification: Main-belt Asteroid          SPK-ID: 2090500
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1075330735195772 4.3184e-08  
a 3.076847541757936 2.6546e-08 au
q 2.745984668841549 1.3558e-07 au
i 15.30328111064741 5.0726e-06 deg
node 53.39014466930835 1.8828e-05 deg
peri 192.3829469633007 3.0831e-05 deg
M 301.0931463869478 2.5625e-05 deg
tp 2459323.067581966105
(2021-Apr-18.56758197)
0.00014113 TDB
period 1971.321202632824
5.40
2.5512e-05
6.985e-08
d
yr
n .1826186415076332 2.3633e-09 deg/d
Q 3.407710414674322 2.94e-08 au
  Orbit Determination Parameters
   # obs. used (total)      941  
   data-arc span      13506 days (36.98 yr)  
   first obs. used      1983-05-08  
   last obs. used      2020-04-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .47251  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 16:32:20  

Additional Information
 Earth MOID = 1.73511 au 
 Jupiter MOID = 1.60874 au 
 T_jup = 3.166 
[ 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 14.2   n/a MPO337934  
diameter diameter 5.844 km 0.263 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.156   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

90500 (2004 EG4)          Discovered 2004-Mar-11 by NEAT at Palomar
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

[ show close-approach data ]
Alternate Designations
 2004 EG4 = 1983 JT1 = 1999 JV125 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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