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JPL Small-Body Database Browser
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65643 (1981 EH12)
Classification: Main-belt Asteroid          SPK-ID: 2065643
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1652073760569968 4.2836e-08  
a 2.358317915592115 1.2899e-08 au
q 1.968706400848936 1.0106e-07 au
i 4.253517290277213 4.8429e-06 deg
node 260.9041297984355 0.00010147 deg
peri 348.344969307126 0.00010506 deg
M 136.4804610177721 2.9582e-05 deg
tp 2458099.001160588405
(2017-Dec-11.50116059)
0.00010761 TDB
period 1322.823654330014
3.62
1.0853e-05
2.971e-08
d
yr
n .2721451183773497 2.2327e-09 deg/d
Q 2.747929430335294 1.5029e-08 au
  Orbit Determination Parameters
   # obs. used (total)      421  
   data-arc span      13788 days (37.75 yr)  
   first obs. used      1981-02-12  
   last obs. used      2018-11-13  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .58097  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 04:50:01  

Additional Information
 Earth MOID = .954661 au 
 Jupiter MOID = 2.28918 au 
 T_jup = 3.531 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.2   n/a MPO359198  

65643 (1981 EH12)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1981 EH12 = 2000 SM49 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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