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226987 (2004 XE44)
Classification: Main-belt Asteroid          SPK-ID: 2226987
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 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .06047343973523994 4.6902e-08  
a 2.918066413165953 2.8895e-08 au
q 2.741600899785934 1.419e-07 au
i 2.806854122195821 5.4798e-06 deg
node 57.13166533117608 0.00010941 deg
peri 339.7823445685071 0.0001192 deg
M 68.65610300596327 4.6076e-05 deg
tp 2458653.269526352555
(2019-Jun-18.76952635)
0.00023354 TDB
period 1820.711707191168
4.98
2.7043e-05
7.404e-08
d
yr
n .1977248779024857 2.9368e-09 deg/d
Q 3.094531926545972 3.0642e-08 au
  Orbit Determination Parameters
   # obs. used (total)      264  
   data-arc span      7382 days (20.21 yr)  
   first obs. used      1999-11-12  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53451  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 06:01:27  

Additional Information
 Earth MOID = 1.74875 au 
 Jupiter MOID = 2.1779 au 
 T_jup = 3.276 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457278.5 (2015-Sep-13.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .05771037303621682 4.6442e-08  
q 2.750710476778791 1.3963e-07 au
tp 2456825.673976517988
(2014-Jun-17.17397652)
0.00025296 TDB
node 57.22087429916872 0.00010961 deg
peri 338.5346063192795 0.00012055 deg
i 2.805432058160823 5.4709e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      264  
   data-arc span      7382 days (20.21 yr)  
   first obs. used      1999-11-12  
   last obs. used      2020-01-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53451  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-25 06:01:27  

Additional Information
 Jupiter MOID = 2.1779 au 
 T_jup = 3.276 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.156877068663986E-15 -6.360865587076923E-15 9.812873429278689E-13 1.935693320755474E-14 1.660355807741705E-13 -3.244079758635054E-16
q -6.360865587076923E-15 1.949590424048217E-14 -4.339871486612762E-12 -5.741907580178445E-14 -7.415787926224313E-13 1.371908965195077E-15
tp 9.812873429278689E-13 -4.339871486612762E-12 6.39872012646858E-8 5.797777423873884E-11 1.272455110854061E-8 3.140085842928352E-12
node 1.935693320755474E-14 -5.741907580178445E-14 5.797777423873884E-11 1.201396447114797E-8 -1.198777761094343E-8 3.04349274449481E-11
peri 1.660355807741705E-13 -7.415787926224313E-13 1.272455110854061E-8 -1.198777761094343E-8 1.45318904069868E-8 -2.97720327809022E-11
i -3.244079758635054E-16 1.371908965195077E-15 3.140085842928352E-12 3.04349274449481E-11 -2.97720327809022E-11 2.993118754663215E-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 15.9   n/a MPO454631  

226987 (2004 XE44)          Discovered 2004-Dec-11 by CINEOS at Campo Imperatore
Reference: 20091202/Numbers.arcLast Updated: 2009-12-04

Alternate Designations
 2004 XE44 = 2006 BZ263 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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