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JPL Small-Body Database Browser
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469421 (2001 XD255)
Classification: TransNeptunian Object          SPK-ID: 2469421
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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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.


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Orbital Elements at Epoch 2458600.5 (2019-Apr-27.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1118486801806388 3.0547e-05  
a 39.2881037906652 0.0012815 au
q 34.89378123487934 0.0014041 au
i 18.14117592092203 0.00015981 deg
node 106.7391025106055 0.00014675 deg
peri 111.8925294822881 0.012563 deg
M 284.6741368704995 0.013563 deg
tp 2477421.021169273761
(2070-Nov-05.52116927)
2.5021 TDB
period 89947.69312221865
246.26
4.4008
0.01205
d
yr
n .004002326102025108 1.9582e-07 deg/d
Q 43.68242634645105 0.0014248 au
  Orbit Determination Parameters
   # obs. used (total)      126  
   data-arc span      4853 days (13.29 yr)  
   first obs. used      2001-12-09  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .55936  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 07:42:46  

Additional Information
 Earth MOID = 33.9302 au 
 Jupiter MOID = 29.6985 au 
 T_jup = 5.322 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456614.5 (2013-Nov-18.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1095164759052979 3.1124e-05  
q 35.2754370784867 0.0013865 au
tp 2476626.312910491273
(2068-Sep-01.81291049)
2.4863 TDB
node 106.6446378516823 0.00014732 deg
peri 107.5097613683205 0.012604 deg
i 18.06217365325527 0.00015906 deg
  Orbit Determination Parameters
   # obs. used (total)      126  
   data-arc span      4853 days (13.29 yr)  
   first obs. used      2001-12-09  
   last obs. used      2015-03-24  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .55936  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-09 07:42:46  

Additional Information
 Jupiter MOID = 29.6985 au 
 T_jup = 5.322 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.686884269112988E-10 -2.643385129878751E-8 -3.908360545390868E-5 -1.302114750406094E-10 -8.480766858713645E-8 -1.521331176265562E-10
q -2.643385129878751E-8 1.922287263976166E-6 -.001276233460840697 4.127029533456496E-9 -1.114642928267176E-5 9.67615270176266E-9
tp -3.908360545390868E-5 -.001276233460840697 6.181745227334653 4.150529811842806E-6 .02981891162001086 -4.464153059163619E-6
node -1.302114750406094E-10 4.127029533456496E-9 4.150529811842806E-6 2.170312440152429E-8 -1.558318072461549E-8 2.314353308202188E-8
peri -8.480766858713645E-8 -1.114642928267176E-5 .02981891162001086 -1.558318072461549E-8 .000158871122236292 -6.988479944950348E-8
i -1.521331176265562E-10 9.67615270176266E-9 -4.464153059163619E-6 2.314353308202188E-8 -6.988479944950348E-8 2.530120168757524E-8

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 5.6   n/a MPO382875  

469421 (2001 XD255)          Discovered 2001-Dec-09 by Sheppard, S. S., Jewitt, D. C., Kleyna, J. at Mauna Kea
Reference: Last Updated: 2016-08-22
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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