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(2017 WJ16)
Classification: Aten [NEO]          SPK-ID: 3789720
[ 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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2142929569521974 1.2739e-08  
a .8225409163820312 2.6559e-09 au
q .6462761911963556 1.1833e-08 au
i 5.716408309886003 7.8268e-06 deg
node 58.99847305409661 5.0774e-06 deg
peri 186.5850850076059 2.0769e-05 deg
M 205.3286236530388 3.2603e-05 deg
tp 2459317.569062961936
(2021-Apr-13.06906296)		 2.4364e-05 TDB
period 272.4800390458603
0.75		 1.3197e-06
3.613e-09		 d
yr
n 1.321197696758291 6.3989e-09 deg/d
Q .9988056415677068 3.225e-09 au
   Orbit Determination Parameters
   # obs. used (total)      151  
   # delay obs. used      2  
   # Doppler obs. used      0  
   data-arc span      1105 days (3.03 yr)  
   first obs. used      2017-11-25  
   last obs. used      2020-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40478  
   source      ORB  
   producer      Giorgini  
   solution date      2020-Dec-07 19:04:31  

Additional Information
 Earth MOID = .00805127 au 
 Jupiter MOID = 4.00204 au 
 T_jup = 7.099 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458715.5 (2019-Aug-20.0) TDB
Reference: JPL 20 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .211977071215376 1.3734e-08  
q .649308032472582 1.156e-08 au
tp 2458772.216358993581
(2019-Oct-15.71635899)		 2.5034e-05 TDB
node 59.22001098116621 4.8129e-06 deg
peri 187.1932368166923 2.0664e-05 deg
i 5.773905826580662 7.7319e-06 deg
   Orbit Determination Parameters
   # obs. used (total)      151  
   # delay obs. used      2  
   # Doppler obs. used      0  
   data-arc span      1105 days (3.03 yr)  
   first obs. used      2017-11-25  
   last obs. used      2020-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .40478  
   source      ORB  
   producer      Giorgini  
   solution date      2020-Dec-07 19:04:31  

Additional Information
 Jupiter MOID = 4.00204 au 
 T_jup = 7.099 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.886277231953009E-16 -1.573979073163468E-16 2.887330002400512E-13 2.248486955673995E-14 2.148115590303229E-13 4.361174058126191E-14
q -1.573979073163468E-16 1.336272261640439E-16 -2.320841969531424E-13 -1.780926444794311E-14 -1.706504024842141E-13 -3.657331995266396E-14
tp 2.887330002400512E-13 -2.320841969531424E-13 6.267227402638596E-10 2.917774699251724E-11 5.020950839429041E-10 5.760955249914721E-11
node 2.248486955673995E-14 -1.780926444794311E-14 2.917774699251724E-11 2.316360470499597E-11 1.217080527220308E-12 2.247544591057832E-11
peri 2.148115590303229E-13 -1.706504024842141E-13 5.020950839429041E-10 1.217080527220308E-12 4.270018790589635E-10 2.332396964419601E-11
i 4.361174058126191E-14 -3.657331995266396E-14 5.760955249914721E-11 2.247544591057832E-11 2.332396964419601E-11 5.978223670170452E-11

[ 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 24.5   n/a E2020X02  

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