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(2020 HM4)
Classification: Apollo [NEO]          SPK-ID: 54016686
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Close-Approach Data ]

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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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6874413379066304 5.0717e-06  
a 2.244712958261751 3.4449e-05 au
q .7016044790179425 6.4905e-07 au
i 2.31570380629182 2.0454e-05 deg
node 226.4971683318542 7.7474e-05 deg
peri 74.24825531030289 0.00012634 deg
M 109.8084551103214 0.0024786 deg
tp 2459021.809287676525
(2020-Jun-21.30928768)
0.00016773 TDB
period 1228.399546291151
3.36
0.028278
7.742e-05
d
yr
n .2930642567289536 6.7463e-06 deg/d
Q 3.787821437505559 5.813e-05 au
  Orbit Determination Parameters
   # obs. used (total)      52  
   # delay obs. used      2  
   # Doppler obs. used      1  
   data-arc span      17 days  
   first obs. used      2020-04-20  
   last obs. used      2020-05-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      4  
   norm. resid. RMS      .40419  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 22:25:22  

Additional Information
 Earth MOID = .000814963 au 
 Jupiter MOID = 1.4948 au 
 T_jup = 3.271 
[ show covariance matrix ]

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 24.5   .42983 MPO546171 autocmod 2.8

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