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

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104697498202652 1.3556e-05  
a 39.20150902493665 0.0012327 au
q 34.87092813037503 0.001171 au
i 18.14691601631295 9.7097e-05 deg
node 106.7474272419121 9.6273e-05 deg
peri 112.8372097160204 0.012291 deg
M 285.1950680081829 0.012131 deg
tp 2477629.105091952624
(2071-Jun-01.60509195)
2.1475 TDB
period 89650.47697438649
245.45
4.2286
0.01158
d
yr
n .004015594920960136 1.8941e-07 deg/d
Q 43.53208991949827 0.0013689 au
  Orbit Determination Parameters
   # obs. used (total)      134  
   data-arc span      6623 days (18.13 yr)  
   first obs. used      2001-12-09  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .5398  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 13:57:39  

Additional Information
 Earth MOID = 33.9063 au 
 Jupiter MOID = 29.6723 au 
 T_jup = 5.317 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456860.5 (2014-Jul-22.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1104553704110234 1.3876e-05  
q 35.25283053571367 0.0011155 au
tp 2476582.344188924846
(2068-Jul-19.84418892)
2.2131 TDB
node 106.6469910900591 9.6561e-05 deg
peri 107.3907217349606 0.012306 deg
i 18.06465440063932 9.6559e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      134  
   data-arc span      6623 days (18.13 yr)  
   first obs. used      2001-12-09  
   last obs. used      2020-01-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .5398  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-26 13:57:39  

Additional Information
 Jupiter MOID = 29.6723 au 
 T_jup = 5.317 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.925550044587674E-10 -3.588956236850843E-9 -9.052828879113943E-6 -3.080924972491562E-11 -2.766504684112211E-8 -2.079895145591928E-11
q -3.588956236850843E-9 1.244279665035515E-6 -.002122832234845278 -2.144359834523948E-9 -1.265163548875181E-5 1.99765098741232E-9
tp -9.052828879113943E-6 -.002122832234845278 4.898009991193927 6.704205452915823E-6 .02697769593739101 -2.1400916026242E-6
node -3.080924972491562E-11 -2.144359834523948E-9 6.704205452915823E-6 9.324046591498954E-9 2.583350398768513E-8 9.080386752965597E-9
peri -2.766504684112211E-8 -1.265163548875181E-5 .02697769593739101 2.583350398768513E-8 .0001514375073916532 -2.358750177905127E-8
i -2.079895145591928E-11 1.99765098741232E-9 -2.1400916026242E-6 9.080386752965597E-9 -2.358750177905127E-8 9.323621761773735E-9

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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