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(2019 HF4)
Classification: Apollo [NEO]          SPK-ID: 3841669
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

[ hide orbit diagram ]

For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3792618965966699 0.00041542  
a 1.58912736490463 0.0010437 au
q .9864319065572318 1.2461e-05 au
i 3.853170623029692 0.0033247 deg
node 34.45855333400023 9.6437e-05 deg
peri 153.1347739958234 0.0013335 deg
M 307.5796318939903 0.30506 deg
tp 2459307.045239970286
(2021-Apr-02.54523997)
0.725 TDB
period 731.7057810760707
2.00
0.72083
0.001974
d
yr
n .4920010328066181 0.00048469 deg/d
Q 2.191822823252028 0.0014395 au
  Orbit Determination Parameters
   # obs. used (total)      10  
   data-arc span      2 days  
   first obs. used      2019-04-23  
   last obs. used      2019-04-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .65498  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 21:14:24  

Additional Information
 Earth MOID = .00516321 au 
 Jupiter MOID = 2.76268 au 
 T_jup = 4.295 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458597.5 (2019-Apr-24.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3812038835873555 0.00041158  
q .9857041371648634 1.0296e-05 au
tp 2458575.326847596720
(2019-Apr-01.82684760)
0.0050598 TDB
node 34.49788515697518 1.9928e-05 deg
peri 152.8999912765846 0.0019862 deg
i 3.861333675047923 0.003307 deg
  Orbit Determination Parameters
   # obs. used (total)      10  
   data-arc span      2 days  
   first obs. used      2019-04-23  
   last obs. used      2019-04-25  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .65498  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 21:14:24  

Additional Information
 Jupiter MOID = 2.76268 au 
 T_jup = 4.295 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.693983596740862E-7 -4.162248248617744E-9 2.059708976047876E-6 2.867630395340604E-9 7.256171333725997E-7 1.360797671036626E-6
q -4.162248248617744E-9 1.060138910537863E-10 -4.916477344775552E-8 -8.224200981610036E-11 -1.6060621966863E-8 -3.337358907876028E-8
tp 2.059708976047876E-6 -4.916477344775552E-8 2.560158771888775E-5 3.02058089150068E-8 9.505778718318623E-6 1.656949484723085E-5
node 2.867630395340604E-9 -8.224200981610036E-11 3.02058089150068E-8 3.97116352259958E-10 6.268721720935882E-9 2.19452315488831E-8
peri 7.256171333725997E-7 -1.6060621966863E-8 9.505778718318623E-6 6.268721720935882E-9 3.945062414484556E-6 5.858803066019287E-6
i 1.360797671036626E-6 -3.337358907876028E-8 1.656949484723085E-5 2.19452315488831E-8 5.858803066019287E-6 1.093653846394584E-5

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 27.6   .19029 MPO467582 autocmod 2.6q

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