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JPL Small-Body Database Browser
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(2021 OB1)
Classification: Apollo [NEO]          SPK-ID: 54175299
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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5027878508341019 0.00066717  
a 1.892966298489464 0.0024283 au
q .9412058415705612 5.5656e-05 au
i 4.775021043086048 0.0048787 deg
node 302.151749832084 9.9157e-05 deg
peri 52.35391154642058 0.00096481 deg
M 334.3364799143079 0.05319 deg
tp 2459464.315110609290
(2021-Sep-06.81511061)
0.010075 TDB
period 951.289602432801
2.60
1.8304
0.005011
d
yr
n .378433653725791 0.00072817 deg/d
Q 2.844726755408366 0.0036491 au
  Orbit Determination Parameters
   # obs. used (total)      50  
   data-arc span      4 days  
   first obs. used      2021-07-29  
   last obs. used      2021-08-02  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .3363  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-15 06:04:00  

Additional Information
 Earth MOID = .0193282 au 
 Jupiter MOID = 2.62453 au 
 T_jup = 3.788 
[ 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 25.76   .28033 E2021-PH9 autocmod 2.9c

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