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173170 (1997 EU31)
Classification: Main-belt Asteroid          SPK-ID: 2173170
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 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2051097170742484 4.6991e-08  
a 2.430352831049938 1.2449e-08 au
q 1.931863849482687 1.1741e-07 au
i 1.70536410797125 8.7065e-06 deg
node 17.77878887362652 0.00014633 deg
peri 66.31024488321282 0.00014847 deg
M 118.9456837546701 2.3043e-05 deg
tp 2458543.255379351177
(2019-Feb-28.75537935)
8.6938e-05 TDB
period 1383.892699907352
3.79
1.0633e-05
2.911e-08
d
yr
n .2601357749947673 1.9988e-09 deg/d
Q 2.92884181261719 1.5003e-08 au
  Orbit Determination Parameters
   # obs. used (total)      219  
   data-arc span      8449 days (23.13 yr)  
   first obs. used      1997-03-10  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .65523  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:25:01  

Additional Information
 Earth MOID = .948707 au 
 Jupiter MOID = 2.30433 au 
 T_jup = 3.478 
[ 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 17.8   n/a MPO459805  

173170 (1997 EU31)          Discovered 1997-Mar-10 by Spacewatch at Kitt Peak
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Alternate Designations
 1997 EU31 = 1999 TN304 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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