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JPL Small-Body Database Browser
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(2021 AA)
Classification: Apollo [NEO]          SPK-ID: 54103879
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 2459217.5 (2021-Jan-03.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5923004827158876 0.00082257  
a 1.014981114757335 0.0010983 au
q .4138073105390557 0.00038818 au
i 24.11566188557896 0.052128 deg
node 100.9943284061478 0.00041354 deg
peri 236.1767582171123 0.020966 deg
M 54.42893488354152 0.14342 deg
tp 2459161.030660985356
(2020-Nov-07.53066099)
0.057176 TDB
period 373.49549626074
1.02
0.60621
0.00166
d
yr
n .963867044192365 0.0015644 deg/d
Q 1.616154918975614 0.0017487 au
  Orbit Determination Parameters
   # obs. used (total)      25  
   data-arc span      1 day  
   first obs. used      2021-01-02  
   last obs. used      2021-01-03  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      8  
   norm. resid. RMS      .30742  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-28 06:19:17  

Additional Information
 Earth MOID = .000171206 au 
 Jupiter MOID = 3.86886 au 
 T_jup = 5.776 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 6.766196665183194E-7 -3.188453507117739E-7 4.703050154242822E-5 -2.470181688555818E-7 1.693694119305238E-5 4.287733505340424E-5
q -3.188453507117739E-7 1.506860381471461E-7 -2.215447622410606E-5 1.105146132909415E-7 -7.898763307113621E-6 -2.021265300499186E-5
tp 4.703050154242822E-5 -2.215447622410606E-5 .003269139351196745 -1.727470489903894E-5 .001178736979611509 .002980187332826952
node -2.470181688555818E-7 1.105146132909415E-7 -1.727470489903894E-5 1.71013265962764E-7 -7.298198495216727E-6 -1.554869919175241E-5
peri 1.693694119305238E-5 -7.898763307113621E-6 .001178736979611509 -7.298198495216727E-6 .0004395749156961719 .00107188099127026
i 4.287733505340424E-5 -2.021265300499186E-5 .002980187332826952 -1.554869919175241E-5 .00107188099127026 .002717320017214087

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 26.98   .29685 E2021-HE4 autocmod 2.8

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