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215099 (1981 EN36)
Classification: Main-belt Asteroid          SPK-ID: 2215099
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 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1699499530628744 5.8677e-08  
a 2.760213488874216 3.3259e-08 au
q 2.29111533599653 1.6211e-07 au
i 7.881822670285405 7.8264e-06 deg
node 218.5808162752444 4.2379e-05 deg
peri 250.650641346704 4.7886e-05 deg
M 245.984281322254 2.0688e-05 deg
tp 2459530.986902770546
(2021-Nov-12.48690277)
9.7508e-05 TDB
period 1674.99084522871
4.59
3.0274e-05
8.289e-08
d
yr
n .2149265478229191 3.8846e-09 deg/d
Q 3.229311641751901 3.8911e-08 au
  Orbit Determination Parameters
   # obs. used (total)      197  
   data-arc span      13603 days (37.24 yr)  
   first obs. used      1981-02-14  
   last obs. used      2018-05-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61335  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:56:58  

Additional Information
 Earth MOID = 1.32214 au 
 Jupiter MOID = 1.98558 au 
 T_jup = 3.307 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456958.5 (2014-Oct-28.0) TDB
Reference: JPL 11 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1674204091968678 5.8254e-08  
q 2.300328043399561 1.6056e-07 au
tp 2456172.481909739613
(2012-Sep-01.98190974)
0.0001082 TDB
node 218.7134626648601 4.225e-05 deg
peri 249.7782428631866 4.8058e-05 deg
i 7.888581786151571 7.8348e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      197  
   data-arc span      13603 days (37.24 yr)  
   first obs. used      1981-02-14  
   last obs. used      2018-05-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .61335  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Jul-13 06:56:58  

Additional Information
 Jupiter MOID = 1.98558 au 
 T_jup = 3.307 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.393471094718207E-15 -9.215564235503546E-15 -2.279362662391193E-12 4.427667110218547E-15 -4.422451381344817E-13 -3.693609283530056E-16
q -9.215564235503546E-15 2.578103832982461E-14 5.082000455307099E-12 -1.513402888292178E-14 1.041705720132149E-12 2.111107220070847E-15
tp -2.279362662391193E-12 5.082000455307099E-12 1.170730736855349E-8 -3.896228529964283E-12 2.48367678227798E-9 2.717825876428585E-12
node 4.427667110218547E-15 -1.513402888292178E-14 -3.896228529964283E-12 1.785026926913877E-9 -1.768852687850898E-9 5.956268266601762E-11
peri -4.422451381344817E-13 1.041705720132149E-12 2.48367678227798E-9 -1.768852687850898E-9 2.309580398908278E-9 -5.837547782673579E-11
i -3.693609283530056E-16 2.111107220070847E-15 2.717825876428585E-12 5.956268266601762E-11 -5.837547782673579E-11 6.138352307332439E-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 16.1   n/a MPO440134  

215099 (1981 EN36)          Discovered 1981-Mar-07 by Bus, S. J. at Siding Spring
Reference: 20090607/Numbers.arcLast Updated: 2009-06-08

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Alternate Designations
 1981 EN36 = 2004 FX12 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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