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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1124204038363131 4.0523e-08  
a 2.314984251572984 8.9316e-09 au
q 2.054732787136444 9.4904e-08 au
i 5.95147688771103 4.4117e-06 deg
node 178.7181888348888 3.6407e-05 deg
peri 63.21807351468826 4.1794e-05 deg
M 350.4254391000337 1.8476e-05 deg
tp 2459034.716600043653
(2020-Jul-04.21660004)
6.5988e-05 TDB
period 1286.531690007689
3.52
7.4455e-06
2.038e-08
d
yr
n .2798221006105558 1.6194e-09 deg/d
Q 2.575235716009524 9.9357e-09 au
  Orbit Determination Parameters
   # obs. used (total)      589  
   data-arc span      14344 days (39.27 yr)  
   first obs. used      1981-03-07  
   last obs. used      2020-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53457  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:09:21  

Additional Information
 Earth MOID = 1.0507 au 
 Jupiter MOID = 2.43328 au 
 T_jup = 3.566 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457459.5 (2016-Mar-12.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1127988399100513 4.0465e-08  
q 2.054360659655683 9.4875e-08 au
tp 2457746.820321694644
(2016-Dec-24.32032169)
6.761e-05 TDB
node 178.7343131167301 3.6407e-05 deg
peri 62.89961206446021 4.1761e-05 deg
i 5.950805722631376 4.4116e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      589  
   data-arc span      14344 days (39.27 yr)  
   first obs. used      1981-03-07  
   last obs. used      2020-06-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53457  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jun-23 23:09:21  

Additional Information
 Jupiter MOID = 2.43328 au 
 T_jup = 3.566 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.637427019842721E-15 -3.825853424406836E-15 -1.394245392007483E-13 2.300752001428786E-14 -9.102035607236092E-15 -3.629973209958769E-15
q -3.825853424406836E-15 9.001278881197883E-15 1.675774349780724E-13 -5.459777209901831E-14 -2.712812555207071E-14 8.519142582074083E-15
tp -1.394245392007483E-13 1.675774349780724E-13 4.57111591786728E-9 -1.549844001092423E-12 1.393517758449566E-9 4.151255124647576E-12
node 2.300752001428786E-14 -5.459777209901831E-14 -1.549844001092423E-12 1.325468193046709E-9 -1.317648991531626E-9 3.092480666458642E-11
peri -9.102035607236092E-15 -2.712812555207071E-14 1.393517758449566E-9 -1.317648991531626E-9 1.743997211723998E-9 -2.964031178859188E-11
i -3.629973209958769E-15 8.519142582074083E-15 4.151255124647576E-12 3.092480666458642E-11 -2.964031178859188E-11 1.946207019781419E-11

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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