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JPL Small-Body Database Browser
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20661 (1999 UZ)
Classification: Outer Main-belt Asteroid          SPK-ID: 2020661
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 19 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1702831194456496 4.338e-08  
a 3.203485480160129 2.5526e-08 au
q 2.657985979499618 1.3765e-07 au
i 1.460584016104619 5.3203e-06 deg
node 43.4450086417236 0.00020255 deg
peri 258.6361228087345 0.0002033 deg
M 282.2843762920886 2.0517e-05 deg
tp 2459452.604055428998
(2021-Aug-26.10405543)
0.00012202 TDB
period 2094.269494203011
5.73
2.5031e-05
6.853e-08
d
yr
n .1718976478416406 2.0546e-09 deg/d
Q 3.74898498082064 2.9873e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1007  
   data-arc span      9585 days (26.24 yr)  
   first obs. used      1993-10-10  
   last obs. used      2020-01-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55503  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 01:23:12  

Additional Information
 Earth MOID = 1.64308 au 
 Jupiter MOID = 1.49062 au 
 T_jup = 3.170 
[ 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 14.0   n/a MPO279729  
diameter diameter 8.023 km 0.202 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.057   0.013 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20661 (1999 UZ)          Discovered 1999-Oct-16 by Korlevic, K. at Visnjan
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

[ show close-approach data ]
Alternate Designations
 1999 UZ = 1993 TR44 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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