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(2021 AO)
Classification: Apollo [NEO]          SPK-ID: 54104255
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 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6445923677786606 0.0002906  
a 2.67700576258621 0.002208 au
q .9514282795236461 7.4283e-06 au
i 4.159474010059315 0.0010184 deg
node 260.2108929583916 0.003114 deg
peri 149.8628463539361 0.0031821 deg
M 4.44612621682309 0.0063636 deg
tp 2459180.741604585062
(2020-Nov-27.24160459)
0.003846 TDB
period 1599.824656903286
4.38
1.9793
0.005419
d
yr
n .2250246603254866 0.00027841 deg/d
Q 4.402583245648774 0.0036313 au
  Orbit Determination Parameters
   # obs. used (total)      77  
   data-arc span      28 days  
   first obs. used      2021-01-03  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .5352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:22:27  

Additional Information
 Earth MOID = .00690936 au 
 Jupiter MOID = 1.03344 au 
 T_jup = 3.038 
[ hide covariance matrix ]
Orbital Elements at Epoch 2459223.5 (2021-Jan-09.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6446773702078361 0.00029056  
q .9514550095916219 7.4075e-06 au
tp 2459180.747333178012
(2020-Nov-27.24733318)
0.0038394 TDB
node 260.2099382576668 0.0031132 deg
peri 149.8710907330909 0.0031733 deg
i 4.159127623373429 0.0010186 deg
  Orbit Determination Parameters
   # obs. used (total)      77  
   data-arc span      28 days  
   first obs. used      2021-01-03  
   last obs. used      2021-01-31  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .5352  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 23:22:27  

Additional Information
 Jupiter MOID = 1.03344 au 
 T_jup = 3.038 
Orbit Covariance (6×6)
  e q tp node peri i
e 8.442446058236194E-8 1.96924234603346E-9 1.111091040195175E-6 -9.021525342254092E-7 8.980342160042191E-7 2.956412289440024E-7
q 1.96924234603346E-9 5.48714467333024E-11 2.69391481687401E-8 -2.151519905762218E-8 2.304102570805377E-8 6.785903245501011E-9
tp 1.111091040195175E-6 2.69391481687401E-8 1.474090617961559E-5 -1.192639035203019E-5 1.205917251789711E-5 3.878129249426821E-6
node -9.021525342254092E-7 -2.151519905762218E-8 -1.192639035203019E-5 9.692191945714285E-6 -9.732951808664033E-6 -3.148501067491931E-6
peri 8.980342160042191E-7 2.304102570805377E-8 1.205917251789711E-5 -9.732951808664033E-6 1.007009169317146E-5 3.113931896838297E-6
i 2.956412289440024E-7 6.785903245501011E-9 3.878129249426821E-6 -3.148501067491931E-6 3.113931896838297E-6 1.037618181699412E-6

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 22.90   .32743 E2021G84 autocmod 2.8

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