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20663 (1999 UU2)
Classification: Main-belt Asteroid          SPK-ID: 2020663
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 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1526652523764807 4.1664e-08  
a 2.303351168736997 7.2212e-09 au
q 1.951709481250102 9.6424e-08 au
i 6.487126481724866 4.3716e-06 deg
node 314.4120361030951 3.7027e-05 deg
peri 351.4842814562485 4.0634e-05 deg
M 13.94554114773361 1.7747e-05 deg
tp 2458951.038016205735
(2020-Apr-11.53801621)
6.2957e-05 TDB
period 1276.846411143338
3.50
6.0045e-06
1.644e-08
d
yr
n .2819446386489367 1.3259e-09 deg/d
Q 2.654992856223893 8.3236e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1878  
   data-arc span      10270 days (28.12 yr)  
   first obs. used      1992-09-28  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .4922  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 03:14:26  

Additional Information
 Earth MOID = .937059 au 
 Jupiter MOID = 2.58201 au 
 T_jup = 3.566 
[ 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 14.3   n/a MPO337432  

20663 (1999 UU2)          Discovered 1999-Oct-19 by Juels, C. W. at Fountain Hills
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 UU2 = 1998 FB98 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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