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129563 (1997 ER8)
Classification: Main-belt Asteroid          SPK-ID: 2129563
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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2589482100297809 4.3373e-08  
a 2.636465469750343 1.133e-08 au
q 1.953757455553166 1.1527e-07 au
i 3.745852544454022 5.3625e-06 deg
node 174.5038666594956 7.9841e-05 deg
peri 270.9686115458086 8.1157e-05 deg
M 191.3740013794375 1.1242e-05 deg
tp 2459732.908864867594
(2022-Jun-02.40886487)
5.0484e-05 TDB
period 1563.621229877074
4.28
1.0079e-05
2.759e-08
d
yr
n .2302347864823387 1.4841e-09 deg/d
Q 3.31917348394752 1.4263e-08 au
  Orbit Determination Parameters
   # obs. used (total)      398  
   data-arc span      10104 days (27.66 yr)  
   first obs. used      1991-09-10  
   last obs. used      2019-05-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .56661  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-May-30 07:06:40  

Additional Information
 Earth MOID = .974209 au 
 Jupiter MOID = 1.93996 au 
 T_jup = 3.346 
[ 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 16.4   n/a MPO436627  

129563 (1997 ER8)          Discovered 1997-Mar-02 by Spacewatch at Kitt Peak
Reference: 20060711/Numbers.arcLast Updated: 2006-07-17

[ show close-approach data ]
Alternate Designations
 1997 ER8 = 2000 WF47 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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