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JPL Small-Body Database Browser
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(2017 SN21)
Classification: Apollo [NEO]          SPK-ID: 3782058
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 2 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2669938604754992 0.00049256  
a 1.282127865845767 0.00079671 au
q .939807597320393 4.7905e-05 au
i 8.806411655943034 0.013886 deg
node 194.3752679763746 0.0011788 deg
peri 232.6021821968562 0.012629 deg
M 174.1238003026086 0.82507 deg
tp 2459140.021436731879
(2020-Oct-17.52143673)
0.97623 TDB
period 530.2680197426187
1.45
0.49426
0.001353
d
yr
n .6789019639063595 0.0006328 deg/d
Q 1.624448134371142 0.0010094 au
  Orbit Determination Parameters
   # obs. used (total)      37  
   data-arc span      6 days  
   first obs. used      2017-09-30  
   last obs. used      2017-10-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      7  
   norm. resid. RMS      .38086  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 19:37:45  

Additional Information
 Earth MOID = .0172901 au 
 Jupiter MOID = 3.6852 au 
 T_jup = 5.004 
[ 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 26.0   n/a MPO421453  

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