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173942 (2001 WW56)
Classification: Main-belt Asteroid          SPK-ID: 2173942
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1894552850480043 6.2727e-08  
a 3.044868684262772 2.7886e-08 au
q 2.468002219752027 1.8467e-07 au
i .5617305394801173 5.8226e-06 deg
node 254.7294400176736 0.00066807 deg
peri 109.2778312032299 0.00066828 deg
M 205.4454211855379 1.9803e-05 deg
tp 2459833.664301383569
(2022-Sep-11.16430138)
0.00011569 TDB
period 1940.668149716563
5.31
2.666e-05
7.299e-08
d
yr
n .185503121722577 2.5483e-09 deg/d
Q 3.621735148773518 3.3169e-08 au
  Orbit Determination Parameters
   # obs. used (total)      298  
   data-arc span      6762 days (18.51 yr)  
   first obs. used      2001-10-21  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60378  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:33:13  

Additional Information
 Earth MOID = 1.46597 au 
 Jupiter MOID = 1.84165 au 
 T_jup = 3.211 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456979.5 (2014-Nov-18.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1885385669514966 6.2817e-08  
q 2.471470718104785 1.8482e-07 au
tp 2457894.255544172585
(2017-May-20.75554417)
9.5994e-05 TDB
node 254.7632780691797 0.00066835 deg
peri 109.6461278816184 0.00066857 deg
i .5613725242097979 5.8219e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      298  
   data-arc span      6762 days (18.51 yr)  
   first obs. used      2001-10-21  
   last obs. used      2020-04-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .60378  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-21 03:33:13  

Additional Information
 Jupiter MOID = 1.84165 au 
 T_jup = 3.211 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.946035029768915E-15 -1.153380482661075E-14 1.879424963710135E-12 1.533147352895292E-14 2.849392241752238E-13 -1.807878243220689E-16
q -1.153380482661075E-14 3.415831119046195E-14 -4.258056410406956E-12 -5.517282887332681E-14 -6.422924972929545E-13 6.904317377623723E-16
tp 1.879424963710135E-12 -4.258056410406956E-12 9.214933125282599E-9 -2.59053343771677E-11 1.665598255514596E-9 4.13627250876812E-13
node 1.533147352895292E-14 -5.517282887332681E-14 -2.59053343771677E-11 4.46697604983721E-7 -4.466804713616557E-7 -1.090384611153257E-9
peri 2.849392241752238E-13 -6.422924972929545E-13 1.665598255514596E-9 -4.466804713616557E-7 4.469806367648368E-7 1.090407144646483E-9
i -1.807878243220689E-16 6.904317377623723E-16 4.13627250876812E-13 -1.090384611153257E-9 1.090407144646483E-9 3.389479176457583E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.1   n/a MPO251411  

173942 (2001 WW56)          Discovered 2001-Nov-19 by LINEAR at Socorro
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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