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(2021 AR7)
Classification: Apollo [NEO]          SPK-ID: 54106290
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 2459230.5 (2021-Jan-16.0) TDB
Reference: JPL 1 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5870783272799736 0.0016203  
a 2.46030721328352 0.009848 au
q 1.015914169914178 8.0045e-05 au
i 1.575699180969027 0.0035454 deg
node 9.14443529219829 0.076894 deg
peri 102.9191360702953 0.084142 deg
M .83865621944114 0.0047785 deg
tp 2459227.216296710642
(2021-Jan-12.71629671)
0.005725 TDB
period 1409.556331623731
3.86
8.4632
0.02317
d
yr
n .2553995125439931 0.0015335 deg/d
Q 3.904700256652863 0.01563 au
  Orbit Determination Parameters
   # obs. used (total)      22  
   data-arc span      2 days  
   first obs. used      2021-01-15  
   last obs. used      2021-01-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      8  
   norm. resid. RMS      .4961  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-17 06:53:59  

Additional Information
 Earth MOID = .0420033 au 
 Jupiter MOID = 1.24746 au 
 T_jup = 3.228 
[ hide covariance matrix ]
Orbit Covariance (6×6)
  e q tp node peri i
e 2.625510314076847E-6 1.294806725001092E-7 -2.945108466626529E-6 6.135820459135353E-5 -6.643011693889833E-5 5.65218054235186E-6
q 1.294806725001092E-7 6.407192025895183E-9 -1.200886720108618E-7 2.71680069983315E-6 -2.936428173021596E-6 2.816834137980252E-7
tp -2.945108466626529E-6 -1.200886720108618E-7 3.277606863855099E-5 -.0004304761810382076 .000471900616111477 -2.913337779343551E-6
node 6.135820459135353E-5 2.71680069983315E-6 -.0004304761810382076 .00591266900262074 -.006469686975599771 8.96746748977062E-5
peri -6.643011693889833E-5 -2.936428173021596E-6 .000471900616111477 -.006469686975599771 .007079831387445233 -9.643835860993623E-5
i 5.65218054235186E-6 2.816834137980252E-7 -2.913337779343551E-6 8.96746748977062E-5 -9.643835860993623E-5 1.257012343118897E-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 26.6   .47362 E2021B55 autocmod 2.8

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