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JPL Small-Body Database Browser
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(2021 RA8)
Classification: Apollo [NEO]          SPK-ID: 54194984
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.


Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 3 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2382191459335949 0.00021517  
a 1.328212148714847 0.00037979 au
q 1.011806585029371 3.6298e-06 au
i 17.41651131593284 0.0092894 deg
node 348.1567734750942 3.0891e-05 deg
peri 5.391380441264705 0.0048004 deg
M 310.5120945576531 0.022926 deg
tp 2459473.359255147700
(2021-Sep-15.85925515)
0.0046557 TDB
period 559.1130116712361
1.53
0.23981
0.0006566
d
yr
n .6438769845901628 0.00027616 deg/d
Q 1.644617712400323 0.00047026 au
  Orbit Determination Parameters
   # obs. used (total)      75  
   data-arc span      1 day  
   first obs. used      2021-09-11  
   last obs. used      2021-09-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .24191  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Sep-15 05:49:39  

Additional Information
 Earth MOID = .00568903 au 
 Jupiter MOID = 3.78492 au 
 T_jup = 4.854 
[ show covariance matrix ]

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 27.859   .3994 3 autocmod 2.9e

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