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120449 (1981 ED44)
Classification: Main-belt Asteroid          SPK-ID: 2120449
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08854119801064873 3.2982e-08  
a 2.354376557542499 1.0401e-08 au
q 2.145917236569499 7.9997e-08 au
i 6.133365955148975 4.4319e-06 deg
node 342.9724971195532 3.4435e-05 deg
peri 110.6339112491704 4.5316e-05 deg
M 24.35707499748003 2.7588e-05 deg
tp 2458911.223954112993
(2020-Mar-02.72395411)
0.00010115 TDB
period 1319.508870529301
3.61
8.744e-06
2.394e-08
d
yr
n .2728287835273069 1.8079e-09 deg/d
Q 2.562835878515499 1.1322e-08 au
  Orbit Determination Parameters
   # obs. used (total)      649  
   data-arc span      14287 days (39.12 yr)  
   first obs. used      1981-03-06  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:05  

Additional Information
 Earth MOID = 1.17165 au 
 Jupiter MOID = 2.55631 au 
 T_jup = 3.542 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457233.5 (2015-Jul-30.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08748076544688818 3.2912e-08  
q 2.148625305321691 7.9751e-08 au
tp 2457591.174533160279
(2016-Jul-21.67453316)
0.00010385 TDB
node 343.0433348453225 3.4389e-05 deg
peri 110.4294637629829 4.5593e-05 deg
i 6.137457408786632 4.4342e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      649  
   data-arc span      14287 days (39.12 yr)  
   first obs. used      1981-03-06  
   last obs. used      2020-04-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52352  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Nov-12 17:57:05  

Additional Information
 Jupiter MOID = 2.55631 au 
 T_jup = 3.542 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.083225352309941E-15 -2.606833494426048E-15 4.872063031219183E-13 -2.684922465813926E-16 1.693353418959144E-13 -1.558499447261049E-15
q -2.606833494426048E-15 6.360246440174782E-15 -1.291300709315354E-12 1.386554764359929E-15 -4.492241579482057E-13 4.119172646900755E-15
tp 4.872063031219183E-13 -1.291300709315354E-12 1.07857131721395E-8 -1.31961456749645E-11 3.117734230966473E-9 4.519892511753089E-12
node -2.684922465813926E-16 1.386554764359929E-15 -1.31961456749645E-11 1.182609516890193E-9 -1.179007027050895E-9 1.882248803896923E-11
peri 1.693353418959144E-13 -4.492241579482057E-13 3.117734230966473E-9 -1.179007027050895E-9 2.078717503290376E-9 -1.751551324105603E-11
i -1.558499447261049E-15 4.119172646900755E-15 4.519892511753089E-12 1.882248803896923E-11 -1.751551324105603E-11 1.966210157550372E-11

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.0   n/a MPO453675  

120449 (1981 ED44)          Discovered 1981-Mar-06 by Bus, S. J. at Siding Spring
Reference: 20060314/Numbers.arcLast Updated: 2006-03-23
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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