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(2020 HW9)
Classification: Apollo [NEO]          SPK-ID: 54016922
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8307535976649622 6.5637e-08  
a 1.948209229125281 2.1726e-08 au
q .3297274030253712 1.2456e-07 au
i 22.05561621166787 1.209e-05 deg
node 136.4511456048047 1.9789e-05 deg
peri 309.359125208464 1.5408e-05 deg
M 104.7855318817656 8.8501e-06 deg
tp 2458911.398301745560
(2020-Mar-02.89830175)
2.0951e-05 TDB
period 993.2345573149622
2.72
1.6615e-05
4.549e-08
d
yr
n .3624521492417639 6.063e-09 deg/d
Q 3.56669105522519 3.9775e-08 au
  Orbit Determination Parameters
   # obs. used (total)      102  
   data-arc span      3271 days (8.96 yr)  
   first obs. used      2011-06-26  
   last obs. used      2020-06-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49322  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Aug-21 08:42:05  

Additional Information
 Earth MOID = .065261 au 
 Jupiter MOID = 2.07914 au 
 T_jup = 3.302 
[ 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 19.1   .48487 E2020-QF4 autocmod 2.8

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