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(2021 HQ1)
Classification: Amor [NEO]          SPK-ID: 54139081
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 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1501817374852009 9.7564e-05  
a 1.234174432923102 0.0001661 au
q 1.048823972226898 2.0746e-05 au
i 7.988572708112516 0.003944 deg
node 33.76222389630799 0.00049763 deg
peri 190.1745597522413 0.0029264 deg
M 259.8824657157429 0.018237 deg
tp 2459339.774269520798
(2021-May-05.27426952)
0.002804 TDB
period 500.7987600366939
1.37
0.1011
0.0002768
d
yr
n .7188516201070916 0.00014512 deg/d
Q 1.419524893619306 0.00019104 au
  Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      18 days  
   first obs. used      2021-04-17  
   last obs. used      2021-05-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .66299  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-07 05:55:24  

Additional Information
 Earth MOID = .0428302 au 
 Jupiter MOID = 3.55083 au 
 T_jup = 5.170 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459323.5 (2021-Apr-19.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1504089927374996 9.733e-05  
q 1.048646020864065 2.0928e-05 au
tp 2459339.868731505159
(2021-May-05.36873151)
0.00265 TDB
node 33.73052434097187 0.00045037 deg
peri 190.3057903891923 0.0027208 deg
i 7.996382150639485 0.0039356 deg
  Orbit Determination Parameters
   # obs. used (total)      23  
   data-arc span      18 days  
   first obs. used      2021-04-17  
   last obs. used      2021-05-05  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      6  
   norm. resid. RMS      .66299  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-07 05:55:24  

Additional Information
 Jupiter MOID = 3.55083 au 
 T_jup = 5.170 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.473153005686202E-9 2.03631466269973E-9 2.526768797579958E-7 -4.367641120470563E-8 2.60271170033609E-7 3.829888361506219E-7
q 2.03631466269973E-9 4.379921260089973E-10 5.408107665826653E-8 -9.40429413821129E-9 5.572681912515659E-8 8.236025196818029E-8
tp 2.526768797579958E-7 5.408107665826653E-8 7.022665998143777E-6 -1.149726411899186E-6 7.208925642356128E-6 1.019107422090975E-5
node -4.367641120470563E-8 -9.40429413821129E-9 -1.149726411899186E-6 2.028332975963185E-7 -1.186121320441604E-6 -1.768278528027432E-6
peri 2.60271170033609E-7 5.572681912515659E-8 7.208925642356128E-6 -1.186121320441604E-6 7.4027167840811E-6 1.05000882281077E-5
i 3.829888361506219E-7 8.236025196818029E-8 1.019107422090975E-5 -1.768278528027432E-6 1.05000882281077E-5 1.548922465195545E-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 26.36   .32373 E2021-HA9 autocmod 2.9c

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