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441857 (2009 WP162)
Classification: Main-belt Asteroid          SPK-ID: 2441857
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2386635856208753 5.4595e-08  
a 2.238854905594167 1.0619e-08 au
q 1.704521766140177 1.1857e-07 au
i 7.859139822639233 6.3709e-06 deg
node 249.9071415784414 3.0833e-05 deg
peri 134.3520389256026 3.5565e-05 deg
M 134.1010927522964 1.2282e-05 deg
tp 2458744.707508665322
(2019-Sep-18.20750867)
4.2029e-05 TDB
period 1223.594032776248
3.35
8.7057e-06
2.383e-08
d
yr
n .294215230179887 2.0933e-09 deg/d
Q 2.773188045048157 1.3154e-08 au
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      6351 days (17.39 yr)  
   first obs. used      2002-09-02  
   last obs. used      2020-01-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57212  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:42:14  

Additional Information
 Earth MOID = .718867 au 
 Jupiter MOID = 2.71071 au 
 T_jup = 3.586 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457779.5 (2017-Jan-26.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2392561128058441 5.4846e-08  
q 1.702932955301891 1.1915e-07 au
tp 2457519.500649975547
(2016-May-11.00064998)
4.3266e-05 TDB
node 249.9690754248105 3.089e-05 deg
peri 133.9804696165909 3.5548e-05 deg
i 7.851581139200754 6.3673e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      6351 days (17.39 yr)  
   first obs. used      2002-09-02  
   last obs. used      2020-01-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .57212  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 14:42:14  

Additional Information
 Jupiter MOID = 2.71071 au 
 T_jup = 3.586 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.008089551678949E-15 -6.523973610395164E-15 1.216151968763501E-13 -5.238544210497845E-14 2.771854530142491E-14 -1.425925649898047E-14
q -6.523973610395164E-15 1.419763017050148E-14 -3.703313200321091E-13 1.143616663834942E-13 -9.671053120042206E-14 3.035123810087076E-14
tp 1.216151968763501E-13 -3.703313200321091E-13 1.871916966351587E-9 -2.185194006431702E-11 7.688495473018936E-10 1.665956398816425E-12
node -5.238544210497845E-14 1.143616663834942E-13 -2.185194006431702E-11 9.541750614204321E-10 -9.51870890025058E-10 -1.680945986310054E-11
peri 2.771854530142491E-14 -9.671053120042206E-14 7.688495473018936E-10 -9.51870890025058E-10 1.263639138058692E-9 1.760512269967201E-11
i -1.425925649898047E-14 3.035123810087076E-14 1.665956398816425E-12 -1.680945986310054E-11 1.760512269967201E-11 4.054220933419751E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.5   n/a MPO503571  
diameter diameter 1.352 km 0.317 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.032   0.024 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

441857 (2009 WP162)          Discovered 2009-Nov-21 by Spacewatch at Kitt Peak
Reference: Last Updated: 2015-09-02
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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