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JPL Small-Body Database Browser
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173118 (1981 EB4)
Classification: Main-belt Asteroid          SPK-ID: 2173118
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08820913407431467 7.5693e-08  
a 3.131602923486219 3.6226e-08 au
q 2.855366941340907 2.4951e-07 au
i 8.481580277187499 6.7451e-06 deg
node 305.5033223391322 4.0145e-05 deg
peri 266.0591046206239 6.5675e-05 deg
M 293.8338833744831 5.8645e-05 deg
tp 2458972.533122185768
(2020-May-03.03312219)
0.00033222 TDB
period 2024.176887165622
5.54
3.5123e-05
9.616e-08
d
yr
n .1778500694690247 3.0861e-09 deg/d
Q 3.407838905631531 3.9422e-08 au
  Orbit Determination Parameters
   # obs. used (total)      308  
   data-arc span      13931 days (38.14 yr)  
   first obs. used      1981-02-02  
   last obs. used      2019-03-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .62727  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 05:21:07  

Additional Information
 Earth MOID = 1.8666 au 
 Jupiter MOID = 1.69581 au 
 T_jup = 3.190 
[ 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 15.3   n/a MPO433111  

173118 (1981 EB4)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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