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(2016 WJ1)
Classification: Apollo [NEO, PHA]          SPK-ID: 3763951
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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 64 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5032795634160507 3.1368e-08  
a 1.339547810771189 6.9185e-09 au
q .6653807733913384 4.1043e-08 au
i 2.88918652734034 3.31e-06 deg
node 82.03848568472647 1.8498e-05 deg
peri 87.66579064013381 1.8738e-05 deg
M 175.3404655629546 7.6398e-06 deg
tp 2458924.686569554776
(2020-Mar-16.18656955)
1.0065e-05 TDB
period 566.2859091966433
1.55
4.3871e-06
1.201e-08
d
yr
n .6357212746308856 4.9251e-09 deg/d
Q 2.013714848151039 1.04e-08 au
  Orbit Determination Parameters
   # obs. used (total)      448  
   data-arc span      6228 days (17.05 yr)  
   first obs. used      2003-07-04  
   last obs. used      2020-07-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40896  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 18:14:51  

Additional Information
 Earth MOID = .000347021 au 
 Jupiter MOID = 2.95722 au 
 T_jup = 4.760 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457840.5 (2017-Mar-28.0) TDB
Reference: JPL 64 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .503282612608656 3.1383e-08  
q .6654414187723098 4.1074e-08 au
tp 2457791.983829147573
(2017-Feb-07.48382915)
4.4287e-06 TDB
node 82.05225424174704 1.8488e-05 deg
peri 87.67580748185728 1.8728e-05 deg
i 2.889443174566803 3.3104e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      448  
   data-arc span      6228 days (17.05 yr)  
   first obs. used      2003-07-04  
   last obs. used      2020-07-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .40896  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 18:14:51  

Additional Information
 Jupiter MOID = 2.95722 au 
 T_jup = 4.760 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.849192651062534E-16 -1.284914235644834E-15 -3.989538321575758E-14 -3.76865572974971E-14 1.392329620482344E-13 5.997976932941741E-15
q -1.284914235644834E-15 1.687109308339935E-15 5.406888244809834E-14 5.095500782653106E-14 -1.830410358788182E-13 -7.778583193472615E-15
tp -3.989538321575758E-14 5.406888244809834E-14 1.96134982798756E-11 1.403089747770144E-11 -5.772844709439841E-12 -1.523683986506783E-13
node -3.76865572974971E-14 5.095500782653106E-14 1.403089747770144E-11 3.417917991465126E-10 -3.364204041513029E-10 -4.55485404245029E-11
peri 1.392329620482344E-13 -1.830410358788182E-13 -5.772844709439841E-12 -3.364204041513029E-10 3.507246613349979E-10 4.615093271358458E-11
i 5.997976932941741E-15 -7.778583193472615E-15 -1.523683986506783E-13 -4.55485404245029E-11 4.615093271358458E-11 1.09585986747384E-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 21.3   n/a MPO394769  
rotation period rot_per 2.68 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Warner, B.D. (2017) Minor Planet Bull. 44, 98-107.]

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