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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 ]

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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.


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3798674120721461 3.9709e-08  
a .6950438265755092 5.275e-09 au
q .431019326897549 2.8401e-08 au
i 24.30965741578345 3.902e-06 deg
node 81.1415247872133 3.6859e-06 deg
peri 183.6472724984381 3.3299e-05 deg
M 160.9369926161986 6.3743e-05 deg
tp 2458905.882799746634
(2020-Feb-26.38279975)
3.7137e-05 TDB
period 211.6492394787253
0.58
2.4095e-06
6.597e-09
d
yr
n 1.700927444325576 1.9364e-08 deg/d
Q .9590683262534695 7.2788e-09 au
  Orbit Determination Parameters
   # obs. used (total)      283  
   # delay obs. used      4  
   # Doppler obs. used      3  
   data-arc span      4467 days (12.23 yr)  
   first obs. used      2008-10-26  
   last obs. used      2021-01-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      1  
   norm. resid. RMS      .40975  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jan-19 05:28:29  

Additional Information
 Earth MOID = .0261064 au 
 Jupiter MOID = 4.1124 au 
 T_jup = 8.103 
[ show covariance matrix ]

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

[ show close-approach data ]
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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