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(2021 HE)
Classification: Amor [NEO]          SPK-ID: 54138309
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3266204021394887 8.1438e-05  
a 1.515846259150205 0.00019291 au
q 1.020739944404925 6.4566e-06 au
i 17.84104987765941 0.0031057 deg
node 212.9120686021038 0.00058878 deg
peri 49.08260577558772 0.0015292 deg
M 265.895944571436 0.019068 deg
tp 2459378.691506849502
(2021-Jun-13.19150685)
0.0020914 TDB
period 681.6809559766225
1.87
0.13013
0.0003563
d
yr
n .5281062890839301 0.00010081 deg/d
Q 2.010952573895485 0.00025591 au
  Orbit Determination Parameters
   # obs. used (total)      72  
   data-arc span      44 days  
   first obs. used      2021-04-16  
   last obs. used      2021-05-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .45016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-30 05:59:21  

Additional Information
 Earth MOID = .0896218 au 
 Jupiter MOID = 3.10093 au 
 T_jup = 4.404 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459325.5 (2021-Apr-21.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3266567240015353 8.1416e-05  
q 1.020668595808481 6.4703e-06 au
tp 2459378.698724097753
(2021-Jun-13.19872410)
0.0020925 TDB
node 212.908469249816 0.00058801 deg
peri 49.09662331461027 0.0015325 deg
i 17.84241815617199 0.0031055 deg
  Orbit Determination Parameters
   # obs. used (total)      72  
   data-arc span      44 days  
   first obs. used      2021-04-16  
   last obs. used      2021-05-30  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .45016  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-30 05:59:21  

Additional Information
 Jupiter MOID = 3.10093 au 
 T_jup = 4.404 
Orbit Covariance (6×6)
  e q tp node peri i
e 6.628491920501374E-9 5.263446727010888E-10 -1.702842577654497E-7 -4.786124249132199E-8 -1.246447940416516E-7 2.528175584659296E-7
q 5.263446727010888E-10 4.186468635561409E-11 -1.353323283794288E-8 -3.801846671352791E-9 -9.911587625169656E-9 2.007903963794922E-8
tp -1.702842577654497E-7 -1.353323283794288E-8 4.378403806194663E-6 1.229414207045963E-6 3.206310600084337E-6 -6.494141184627333E-6
node -4.786124249132199E-8 -3.801846671352791E-9 1.229414207045963E-6 3.457598683182457E-7 8.998476315401395E-7 -1.825917386390868E-6
peri -1.246447940416516E-7 -9.911587625169656E-9 3.206310600084337E-6 8.998476315401395E-7 2.34862198905348E-6 -4.753437405612255E-6
i 2.528175584659296E-7 2.007903963794922E-8 -6.494141184627333E-6 -1.825917386390868E-6 -4.753437405612255E-6 9.644195752405701E-6

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 23.26   .33424 E2021J33 autocmod 2.9c

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]
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