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JPL Small-Body Database Browser
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65653 (1981 EP44)
Classification: Main-belt Asteroid          SPK-ID: 2065653
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 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .112348455291048 4.0775e-08  
a 2.315303332730392 1.3073e-08 au
q 2.055182579767917 9.4997e-08 au
i 5.951000256215888 5.7826e-06 deg
node 178.7232127455673 4.7269e-05 deg
peri 63.09108722596638 5.5819e-05 deg
M 238.6149276289661 3.2285e-05 deg
tp 2459034.383418316972
(2020-Jul-03.88341832)
0.00011729 TDB
period 1286.797688900859
3.52
1.0899e-05
2.984e-08
d
yr
n .2797642575092751 2.3696e-09 deg/d
Q 2.575424085692867 1.4542e-08 au
  Orbit Determination Parameters
   # obs. used (total)      407  
   data-arc span      13819 days (37.83 yr)  
   first obs. used      1981-03-07  
   last obs. used      2019-01-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55752  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 10:58:31  

Additional Information
 Earth MOID = 1.05104 au 
 Jupiter MOID = 2.43335 au 
 T_jup = 3.566 
[ 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 16.4   n/a MPO422120  

65653 (1981 EP44)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20030910/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1981 EP44 = 1999 LM9 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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