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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 60 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3798495294984703 3.925e-08  
a .6950611997328063 5.0208e-09 au
q .4310425300416575 2.8171e-08 au
i 24.30934091067559 3.8249e-06 deg
node 81.13995506312661 3.6016e-06 deg
peri 183.6524293839079 3.2055e-05 deg
M 141.1144671168497 6.1166e-05 deg
tp 2459117.533640371697
(2020-Sep-25.03364037)
3.5676e-05 TDB
period 211.6571750326416
0.58
2.2934e-06
6.279e-09
d
yr
n 1.700863672325217 1.8429e-08 deg/d
Q .9590798694239551 6.928e-09 au
  Orbit Determination Parameters
   # obs. used (total)      291  
   # delay obs. used      4  
   # Doppler obs. used      3  
   data-arc span      4496 days (12.31 yr)  
   first obs. used      2008-10-26  
   last obs. used      2021-02-16  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .41077  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-14 17:01:46  

Additional Information
 Earth MOID = .0264624 au 
 Jupiter MOID = 4.11138 au 
 T_jup = 8.102 
[ 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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