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(2015 WF2)
Classification: Mars-crossing Asteroid          SPK-ID: 3735488
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5362922738231342 5.3889e-07  
a 2.975318230106532 1.1519e-07 au
q 1.379678051135277 1.6122e-06 au
i 19.6528606616759 2.6625e-05 deg
node 20.02921627651796 4.0605e-05 deg
peri 324.2874991169933 0.00010045 deg
M 65.43108862286363 2.8007e-05 deg
tp 2459055.793666425520
(2020-Jul-25.29366643)
0.00016167 TDB
period 1874.556616255863
5.13
0.00010886
2.98e-07
d
yr
n .1920454132343276 1.1153e-08 deg/d
Q 4.570958409077788 1.7697e-07 au
  Orbit Determination Parameters
   # obs. used (total)      152  
   data-arc span      1885 days (5.16 yr)  
   first obs. used      2015-11-19  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41547  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 15:21:11  

Additional Information
 Earth MOID = .417206 au 
 Jupiter MOID = 1.14014 au 
 T_jup = 2.951 
[ hide covariance matrix ]
Orbital Elements at Epoch 2458906.5 (2020-Feb-27.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .5363785818727697 5.3869e-07  
q 1.379326220943704 1.6125e-06 au
tp 2459055.766980687510
(2020-Jul-25.26698069)
0.0001617 TDB
node 20.04632083336469 4.0595e-05 deg
peri 324.2538161958078 0.0001004 deg
i 19.6538533186306 2.6628e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      152  
   data-arc span      1885 days (5.16 yr)  
   first obs. used      2015-11-19  
   last obs. used      2021-01-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41547  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-15 15:21:11  

Additional Information
 Jupiter MOID = 1.14014 au 
 T_jup = 2.951 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.901873558648026E-13 -8.681986230788797E-13 2.973234909914405E-11 -9.059808557633628E-12 -2.819133035398595E-11 -6.962453866601927E-12
q -8.681986230788797E-13 2.600276397748903E-12 -9.554874177369252E-11 2.783193561133045E-11 8.084053042668636E-11 2.157004114620606E-11
tp 2.973234909914405E-11 -9.554874177369252E-11 2.614766000805246E-8 -3.291862674212844E-9 9.195916615508918E-9 -3.14280357649099E-9
node -9.059808557633628E-12 2.783193561133045E-11 -3.291862674212844E-9 1.647951231000022E-9 -1.412149589686797E-9 9.402767128714783E-10
peri -2.819133035398595E-11 8.084053042668636E-11 9.195916615508918E-9 -1.412149589686797E-9 1.008115439688115E-8 -1.040950299094452E-9
i -6.962453866601927E-12 2.157004114620606E-11 -3.14280357649099E-9 9.402767128714783E-10 -1.040950299094452E-9 7.090407498489653E-10

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 17.7   n/a E2021B25  

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