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(2021 HB1)
Classification: Apollo [NEO]          SPK-ID: 54138706
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 2459322.5 (2021-Apr-18.0) TDB
Reference: JPL 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5563893387628205 0.0019575  
a 2.107937920401104 0.0088449 au
q .9351037347160586 0.00020258 au
i 7.39775576743805 0.019241 deg
node 32.14975803265602 0.0075596 deg
peri 221.1160220341693 0.013201 deg
M 347.3975064475694 0.08392 deg
tp 2459361.632638852334
(2021-May-27.13263885)
0.014288 TDB
period 1117.854171337633
3.06
7.0358
0.01926
d
yr
n .3220455845051964 0.002027 deg/d
Q 3.280772106086149 0.013766 au
  Orbit Determination Parameters
   # obs. used (total)      26  
   data-arc span      10 days  
   first obs. used      2021-04-17  
   last obs. used      2021-04-27  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .40579  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-28 06:19:20  

Additional Information
 Earth MOID = .00890089 au 
 Jupiter MOID = 1.82182 au 
 T_jup = 3.517 
[ 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 25.0   .46108 E2021-HE8 autocmod 2.9c

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