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JPL Small-Body Database Browser
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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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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .205282396935474 4.8083e-08  
a 2.430858911346668 1.9905e-08 au
q 1.931846367413467 1.1821e-07 au
i 1.705246502893561 1.1224e-05 deg
node 17.78292765798018 0.00021489 deg
peri 66.35667183441049 0.00021804 deg
M 14.84069485907021 3.8851e-05 deg
tp 2458543.432376025106
(2019-Feb-28.93237603)		 0.00014888 TDB
period 1384.324981145041
3.79		 1.7003e-05
4.655e-08		 d
yr
n .2600545427578913 3.1941e-09 deg/d
Q 2.929871455279868 2.3991e-08 au
   Orbit Determination Parameters
   # obs. used (total)      156  
   data-arc span      7894 days (21.61 yr)  
   first obs. used      1997-03-10  
   last obs. used      2018-10-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .66987  
   source      ORB  
   producer      Otto Matic  
   solution date      2018-Oct-31 03:26:36  

Additional Information
 Earth MOID = .94864 au 
 Jupiter MOID = 2.30373 au 
 T_jup = 3.478 
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[ 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

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