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173891 (2001 UU91)
Classification: Main-belt Asteroid          SPK-ID: 2173891
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1964934877607751 5.8029e-08  
a 3.117072037651339 3.2019e-08 au
q 2.504587681371641 1.9146e-07 au
i 8.752858438697764 5.5209e-06 deg
node 94.31675134173894 4.2164e-05 deg
peri 254.2500682679625 4.4104e-05 deg
M 166.7765790386603 1.579e-05 deg
tp 2458069.282248515427
(2017-Nov-11.78224852)
8.3306e-05 TDB
period 2010.104730933082
5.50
3.0972e-05
8.48e-08
d
yr
n .1790951458697823 2.7596e-09 deg/d
Q 3.729556393931037 3.8311e-08 au
  Orbit Determination Parameters
   # obs. used (total)      361  
   data-arc span      7623 days (20.87 yr)  
   first obs. used      1999-03-21  
   last obs. used      2020-02-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .57077  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-24 17:11:45  

Additional Information
 Earth MOID = 1.51562 au 
 Jupiter MOID = 1.77197 au 
 T_jup = 3.169 
[ 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 15.1   n/a MPO427061  

173891 (2001 UU91)          Discovered 2001-Oct-18 by NEAT at Palomar
Reference: 20080122/Numbers.arcLast Updated: 2008-01-28

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