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JPL Small-Body Database Browser
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85144 (1981 EU30)
Classification: Main-belt Asteroid          SPK-ID: 2085144
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 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1325610900409427 5.696e-08  
a 2.346696119862191 1.0458e-08 au
q 2.035615524218408 1.3554e-07 au
i 6.518427594358059 6.2163e-06 deg
node 340.7700536220006 3.8308e-05 deg
peri 3.685133193850031 4.195e-05 deg
M 56.42656869843891 1.6358e-05 deg
tp 2458394.690768687990
(2018-Oct-03.19076869)
5.9696e-05 TDB
period 1313.05739443932
3.59
8.7778e-06
2.403e-08
d
yr
n .2741692796709174 1.8328e-09 deg/d
Q 2.657776715505974 1.1845e-08 au
  Orbit Determination Parameters
   # obs. used (total)      786  
   data-arc span      13872 days (37.98 yr)  
   first obs. used      1981-02-12  
   last obs. used      2019-02-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55774  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:51:17  

Additional Information
 Earth MOID = 1.02704 au 
 Jupiter MOID = 2.72438 au 
 T_jup = 3.540 
[ 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 MPO400787  

85144 (1981 EU30)          Discovered 1981-Mar-02 by Bus, S. J. at Siding Spring
Reference: 20040830/Numbers.arcLast Updated: 2004-09-06

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