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(2011 UL21)
Classification: Apollo [NEO, PHA]          SPK-ID: 3582235
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6532038792680992 2.8353e-07  
a 2.122152751410701 2.958e-08 AU
q .7359543417897612 6.0857e-07 AU
i 34.85010115942157 4.2839e-05 deg
node 275.607109073525 6.3092e-05 deg
peri 284.7397449026383 4.7753e-05 deg
M 278.9393881657584 2.8902e-05 deg
tp 2457054.755739279617
(2015-Feb-01.25573928)
9.4406e-05 JED
period 1129.180548597797
3.09
2.3609e-05
6.464e-08
d
yr
n .3188152686893549 6.6657e-09 deg/d
Q 3.508351161031642 4.8901e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      133  
   data-arc span      8306 days (22.74 yr)  
   first obs. used      1989-10-29  
   last obs. used      2012-07-26  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53138  
   data source      ORB  
   producer      Otto Matic  
   solution date      2013-Sep-23 17:16:51  

Additional Information
 Earth MOID = .0192581 AU 
 T_jup = 3.246 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.8 mag n/a E2013Q25  

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