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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2385384851898775 5.4594e-08  
a 2.239032392570608 1.0593e-08 au
q 1.704936997355748 1.1857e-07 au
i 7.859284062483065 6.371e-06 deg
node 249.9139663325101 3.083e-05 deg
peri 134.3600222633767 3.5569e-05 deg
M 75.25711408688476 1.2322e-05 deg
tp 2458744.680261102619
(2019-Sep-18.18026110)
4.2067e-05 TDB
period 1223.739537723078
3.35
8.6845e-06
2.378e-08
d
yr
n .2941802474322481 2.0877e-09 deg/d
Q 2.773127787785469 1.312e-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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57265  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:37:56  

Additional Information
 Earth MOID = .720453 au 
 Jupiter MOID = 2.70958 au 
 T_jup = 3.586 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457779.5 (2017-Jan-26.0) TDB
Reference: JPL 15 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2392561129414426 5.4846e-08  
q 1.702932955973627 1.1915e-07 au
tp 2457519.500647007796
(2016-May-11.00064701)
4.3266e-05 TDB
node 249.9690753276576 3.089e-05 deg
peri 133.9804688935298 3.5548e-05 deg
i 7.851581228056562 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.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57265  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 10:37:56  

Additional Information
 Jupiter MOID = 2.70958 au 
 T_jup = 3.586 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.008089122303313E-15 -6.523972526808022E-15 1.21615147254818E-13 -5.23854306182555E-14 2.771858870435472E-14 -1.425926071584531E-14
q -6.523972526808022E-15 1.419762779513726E-14 -3.703314743154348E-13 1.143616281663134E-13 -9.671056821911144E-14 3.035123262172838E-14
tp 1.21615147254818E-13 -3.703314743154348E-13 1.871913996970583E-9 -2.185186878189948E-11 7.688481304973371E-10 1.665997194909065E-12
node -5.23854306182555E-14 1.143616281663134E-13 -2.185186878189948E-11 9.541750620387324E-10 -9.518708647079179E-10 -1.680946853012208E-11
peri 2.771858870435472E-14 -9.671056821911144E-14 7.688481304973371E-10 -9.518708647079179E-10 1.263638562968667E-9 1.760514437255653E-11
i -1.425926071584531E-14 3.035123262172838E-14 1.665997194909065E-12 -1.680946853012208E-11 1.760514437255653E-11 4.054220830522392E-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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