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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 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 37 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1524861565876558 1.6178e-08  
a 2.302930722374275 6.9173e-09 au
q 1.951765667631788 3.7266e-08 au
i 6.487286145782281 6.2181e-07 deg
node 314.4126724114245 2.2591e-06 deg
peri 351.4671978945473 3.398e-06 deg
M 70.37011500817067 3.8774e-06 deg
tp 2458950.979922155433
(2020-Apr-11.47992216)
1.3535e-05 TDB
period 1276.496819901662
3.49
5.7513e-06
1.575e-08
d
yr
n .2820218541772266 1.2707e-09 deg/d
Q 2.654095777116762 7.9721e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2085  
   data-arc span      10387 days (28.44 yr)  
   first obs. used      1992-09-28  
   last obs. used      2021-03-07  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49018  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:26:16  

Additional Information
 Earth MOID = .93512 au 
 Jupiter MOID = 2.58218 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 14.35   n/a E2021B10  

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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