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7156 (1981 EC2)
Classification: Main-belt Asteroid          SPK-ID: 2007156
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1432166985125587 5.3791e-08  
a 2.676809764329787 1.5462e-08 au
q 2.293445907336295 1.4123e-07 au
i 11.07800762141292 6.7772e-06 deg
node 320.5385777388689 2.4596e-05 deg
peri 155.5599445148615 3.3534e-05 deg
M 68.29595268443671 2.1928e-05 deg
tp 2457297.029028233074
(2015-Oct-01.52902823)
9.6771e-05 JED
period 1599.648962228903
4.38
1.386e-05
3.795e-08
d
yr
n .2250493755194807 1.9499e-09 deg/d
Q 3.060173621323279 1.7676e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1156  
   data-arc span      22291 days (61.03 yr)  
   first obs. used      1955-03-24  
   last obs. used      2016-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .48411  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 12:58:16  

Additional Information
 Earth MOID = 1.31253 au 
 Jupiter MOID = 2.03441 au 
 T_jup = 3.337 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.6 mag n/a MPO365335  

7156 (1981 EC2)          Discovered 1981-Mar-04 by Debehogne, H., DeSanctis, G. at La Silla
Reference: DISCOVERY.DBLast Updated: 2003-08-29

Alternate Designations
 1981 EC2 = 1975 XX6 = 1994 BQ4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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