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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1127675048932619 4.0382e-08  
a 2.315795710025953 8.9144e-09 au
q 2.054649205963806 9.4614e-08 au
i 5.951732078028185 4.275e-06 deg
node 178.6992062303636 3.6305e-05 deg
peri 63.25792056489438 4.1601e-05 deg
M 46.34401999645299 1.8098e-05 deg
tp 2459034.793327457742
(2020-Jul-04.29332746)
6.4921e-05 TDB
period 1287.208190393896
3.52
7.4325e-06
2.035e-08
d
yr
n .2796750383400194 1.6149e-09 deg/d
Q 2.5769422140881 9.9197e-09 au
  Orbit Determination Parameters
   # obs. used (total)      605  
   data-arc span      14429 days (39.50 yr)  
   first obs. used      1981-03-07  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53405  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:21:18  

Additional Information
 Earth MOID = 1.04921 au 
 Jupiter MOID = 2.4306 au 
 T_jup = 3.565 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457552.5 (2016-Jun-13.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1126921470988439 4.0355e-08  
q 2.054749206518516 9.4542e-08 au
tp 2457746.686890655267
(2016-Dec-24.18689066)
6.6939e-05 TDB
node 178.7326538103766 3.6307e-05 deg
peri 62.84204887470011 4.1609e-05 deg
i 5.95134185307381 4.2753e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      605  
   data-arc span      14429 days (39.50 yr)  
   first obs. used      1981-03-07  
   last obs. used      2020-09-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53405  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 22:21:18  

Additional Information
 Jupiter MOID = 2.4306 au 
 T_jup = 3.565 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.62854076728335E-15 -3.802110156048154E-15 -1.196806285089748E-13 2.365951089580577E-14 -5.197241721390788E-15 -3.795430909087153E-15
q -3.802110156048154E-15 8.938184719910451E-15 1.126755784357882E-13 -5.61616787721729E-14 -3.850553328154787E-14 8.923172148881887E-15
tp -1.196806285089748E-13 1.126755784357882E-13 4.480888157033913E-9 -1.2824279959288E-12 1.371394907513398E-9 4.010010125169538E-12
node 2.365951089580577E-14 -5.61616787721729E-14 -1.2824279959288E-12 1.318180004803568E-9 -1.310290233429944E-9 3.26116206801883E-11
peri -5.197241721390788E-15 -3.850553328154787E-14 1.371394907513398E-9 -1.310290233429944E-9 1.731281315931062E-9 -3.136977443971874E-11
i -3.795430909087153E-15 8.923172148881887E-15 4.010010125169538E-12 3.26116206801883E-11 -3.136977443971874E-11 1.82782287143124E-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 16.52   n/a E2021B10  

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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