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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.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8308448744695517 6.5609e-08  
a 1.948245953738694 2.1791e-08 au
q .3295557888688567 1.2449e-07 au
i 22.05481706069612 1.2091e-05 deg
node 136.4577712225385 1.9796e-05 deg
peri 309.3488679148041 1.5409e-05 deg
M 32.28496041002109 7.9582e-06 deg
tp 2458911.423763700307
(2020-Mar-02.92376370)
2.0949e-05 TDB
period 993.2626418193094
2.72
1.6664e-05
4.562e-08
d
yr
n .3624419009060947 6.0809e-09 deg/d
Q 3.566936118608531 3.9896e-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 = .0655489 au 
 Jupiter MOID = 2.07868 au 
 T_jup = 3.302 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457186.5 (2015-Jun-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8301821916189618 6.5566e-08  
q .3310529741230455 1.2439e-07 au
tp 2456922.814625828161
(2014-Sep-22.31462583)
2.6105e-05 TDB
node 136.7454602194843 1.972e-05 deg
peri 309.0691516547664 1.5463e-05 deg
i 21.96673810630556 1.2059e-05 deg
  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
 Jupiter MOID = 2.07868 au 
 T_jup = 3.302 
Orbit Covariance (6×6)
  e q tp node peri i
e 4.298875708863736E-15 -8.154839579374457E-15 -1.418180625584545E-12 -5.341630327037933E-13 5.267663888191211E-14 -4.74065354365264E-14
q -8.154839579374457E-15 1.547205901584452E-14 2.686489594724994E-12 1.015936417074424E-12 -9.92626180307677E-14 8.426100741096358E-14
tp -1.418180625584545E-12 2.686489594724994E-12 6.814557318847895E-10 2.818641155879695E-10 2.22932170091173E-11 -6.512622847626165E-11
node -5.341630327037933E-13 1.015936417074424E-12 2.818641155879695E-10 3.888968039865649E-10 -2.141323307801377E-10 -5.648690362413171E-11
peri 5.267663888191211E-14 -9.92626180307677E-14 2.22932170091173E-11 -2.141323307801377E-10 2.391161573956896E-10 -1.576994984110613E-11
i -4.74065354365264E-14 8.426100741096358E-14 -6.512622847626165E-11 -5.648690362413171E-11 -1.576994984110613E-11 1.454246882272896E-10

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 19.206   .48487 12 autocmod 2.8

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