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481817 (2008 UL90)
Classification: Atira [NEO, PHA]          SPK-ID: 2481817
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3798674079886519 3.9923e-08  
a .6950438277984461 5.7849e-09 au
q .4310193304941394 2.868e-08 au
i 24.30965820724706 3.9891e-06 deg
node 81.14152566164783 3.8604e-06 deg
peri 183.6472647789871 3.4725e-05 deg
M 160.9370005098466 6.634e-05 deg
tp 2458905.882794856124
(2020-Feb-26.38279486)
3.8626e-05 TDB
period 211.6492400373239
0.58
2.6423e-06
7.234e-09
d
yr
n 1.700927439836376 2.1235e-08 deg/d
Q .9590683251027528 7.9824e-09 au
  Orbit Determination Parameters
   # obs. used (total)      266  
   # delay obs. used      4  
   # Doppler obs. used      3  
   data-arc span      4056 days (11.10 yr)  
   first obs. used      2008-10-26  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .37859  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-05 11:36:10  

Additional Information
 Earth MOID = .0261063 au 
 Jupiter MOID = 4.1124 au 
 T_jup = 8.103 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456397.5 (2013-Apr-15.0) TDB
Reference: JPL 52 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3802498434602796 3.9951e-08  
q .4306033980856668 2.8801e-08 au
tp 2456366.761017771257
(2013-Mar-15.26101777)
4.238e-05 TDB
node 81.17267066569082 3.8534e-06 deg
peri 183.5919492195245 3.4679e-05 deg
i 24.30949485491212 3.9733e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      266  
   # delay obs. used      4  
   # Doppler obs. used      3  
   data-arc span      4056 days (11.10 yr)  
   first obs. used      2008-10-26  
   last obs. used      2019-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .37859  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-05 11:36:10  

Additional Information
 Jupiter MOID = 4.1124 au 
 T_jup = 8.103 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.596103294748287E-15 -1.142295349778813E-15 8.335935762721918E-13 1.090188283360463E-15 5.121462568956002E-13 -7.064519462618344E-14
q -1.142295349778813E-15 8.294757739460905E-16 -6.538275117991591E-13 1.118892221705279E-15 -3.699042755268609E-13 5.097820737451075E-14
tp 8.335935762721918E-13 -6.538275117991591E-13 1.796094830493137E-9 -1.303283897342686E-10 1.344795724732175E-9 -1.107781394538432E-10
node 1.090188283360463E-15 1.118892221705279E-15 -1.303283897342686E-10 1.484889270056981E-11 -1.201422686585098E-10 1.068404849556032E-11
peri 5.121462568956002E-13 -3.699042755268609E-13 1.344795724732175E-9 -1.201422686585098E-10 1.202627604177954E-9 -9.593000090949185E-11
i -7.064519462618344E-14 5.097820737451075E-14 -1.107781394538432E-10 1.068404849556032E-11 -9.593000090949185E-11 1.578724308343998E-11

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 18.6   n/a MPO446828  

481817 (2008 UL90)          Discovered 2008-Oct-26 by Mt. Lemmon Survey at Mount Lemmon
Reference: Last Updated: 2017-01-17

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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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