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20659 (1999 UE)
Classification: Main-belt Asteroid          SPK-ID: 2020659
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 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1944243848336306 3.9592e-08  
a 3.139282753096836 1.8217e-08 au
q 2.528929635007157 1.3099e-07 au
i .8504380309862329 4.3355e-06 deg
node 344.8627081662929 0.00031552 deg
peri 352.8058398617044 0.00031579 deg
M 315.8836171866164 1.5046e-05 deg
tp 2459449.466820926416
(2021-Aug-22.96682093)
8.5836e-05 TDB
period 2031.627477543767
5.56
1.7684e-05
4.842e-08
d
yr
n .1771978396527887 1.5424e-09 deg/d
Q 3.749635871186515 2.1758e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1248  
   data-arc span      10723 days (29.36 yr)  
   first obs. used      1991-03-13  
   last obs. used      2020-07-21  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55049  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:26:11  

Additional Information
 Earth MOID = 1.5179 au 
 Jupiter MOID = 1.64415 au 
 T_jup = 3.181 
[ 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 13.95   n/a E2021B10  
diameter diameter 8.145 km 0.098 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.073   0.012 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

20659 (1999 UE)          Discovered 1999-Oct-16 by Korlevic, K. at Visnjan
Reference: 20010109/Numbers.arcLast Updated: 2004-04-19

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