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JPL Small-Body Database Browser
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65644 (1981 EO12)
Classification: Main-belt Asteroid          SPK-ID: 2065644
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07066225774576647 3.9411e-08  
a 2.381721785904604 1.1859e-08 au
q 2.213423947190305 9.3322e-08 au
i 6.133393155360905 5.6693e-06 deg
node 215.3331108965308 4.0468e-05 deg
peri 256.3212276514013 6.0092e-05 deg
M 192.2294219051514 4.5486e-05 deg
tp 2459226.174234514275
(2021-Jan-11.67423451)
0.0001715 TDB
period 1342.563916646926
3.68
1.0027e-05
2.745e-08
d
yr
n .2681436582171116 2.0026e-09 deg/d
Q 2.550019624618902 1.2696e-08 au
  Orbit Determination Parameters
   # obs. used (total)      559  
   data-arc span      14143 days (38.72 yr)  
   first obs. used      1981-02-09  
   last obs. used      2019-10-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55697  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 07:39:51  

Additional Information
 Earth MOID = 1.23978 au 
 Jupiter MOID = 2.53311 au 
 T_jup = 3.527 
[ 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 16.0   n/a MPO432208  

65644 (1981 EO12)          Discovered 1981-Mar-01 by Bus, S. J. at Siding Spring
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EO12 = 2001 TP88 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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