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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456927.5 (2014-Sep-27.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .107250050394369 4.3478e-08  
q 2.74827749402056 1.3634e-07 au
tp 2457345.546391704083
(2015-Nov-19.04639170)
0.00013758 TDB
node 53.43317634037656 1.8827e-05 deg
peri 191.3626871005788 3.0753e-05 deg
i 15.30159089824979 5.0716e-06 deg
  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
 Jupiter MOID = 1.60874 au 
 T_jup = 3.166 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.890309938460482E-15 -5.838326546173091E-15 -2.20944120011314E-12 -1.173087113226852E-14 -3.470630960359848E-13 -2.340035848341922E-15
q -5.838326546173091E-15 1.858895531385206E-14 6.922728885990367E-12 3.250692553333702E-14 1.066342657775753E-12 9.239632241365201E-15
tp -2.20944120011314E-12 6.922728885990367E-12 1.892929999465002E-8 3.713983787515182E-11 3.377435479761087E-9 1.196278857261139E-11
node -1.173087113226852E-14 3.250692553333702E-14 3.713983787515182E-11 3.54443149686539E-10 -3.351094117482498E-10 -3.267375396883287E-11
peri -3.470630960359848E-13 1.066342657775753E-12 3.377435479761087E-9 -3.351094117482498E-10 9.457203138257267E-10 3.365968696173719E-11
i -2.340035848341922E-15 9.239632241365201E-15 1.196278857261139E-11 -3.267375396883287E-11 3.365968696173719E-11 2.572151993838815E-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 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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