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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1329853479316555 5.3358e-08  
a 2.346151053418265 9.4808e-09 au
q 2.034147339279217 1.2581e-07 au
i 6.519821667075103 5.6196e-06 deg
node 340.7605328447067 3.5031e-05 deg
peri 3.725974303849551 3.8187e-05 deg
M 220.8853135144067 1.5574e-05 deg
tp 2459707.727583169528
(2022-May-08.22758317)
5.751e-05 TDB
period 1312.599945800405
3.59
7.9564e-06
2.178e-08
d
yr
n .2742648292435187 1.6625e-09 deg/d
Q 2.658154767557313 1.0742e-08 au
  Orbit Determination Parameters
   # obs. used (total)      953  
   data-arc span      14609 days (40.00 yr)  
   first obs. used      1981-02-12  
   last obs. used      2021-02-11  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53758  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 14:11:30  

Additional Information
 Earth MOID = 1.02468 au 
 Jupiter MOID = 2.72746 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 15.37   n/a E2021B10  

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

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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