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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .6531701728891667 2.4136e-07  
a 2.122499153247406 4.9475e-08 AU
q .7361460143636879 5.2095e-07 AU
i 34.84751770611536 3.5588e-05 deg
node 275.6088482342976 4.6019e-05 deg
peri 284.7244103273133 3.8649e-05 deg
M 342.7069438918111 2.7407e-05 deg
tp 2457054.754899726586
(2015-Feb-01.25489973)
8.7448e-05 JED
period 1129.457036360498
3.09
3.9491e-05
1.081e-07
d
yr
n .3187372236486699 1.1144e-08 deg/d
Q 3.508852292131124 8.179e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      141  
   data-arc span      9120 days (24.97 yr)  
   first obs. used      1989-10-29  
   last obs. used      2014-10-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .54216  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-19 06:15:06  

Additional Information
 Earth MOID = .0208823 AU 
 T_jup = 3.245 
[ 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 15.7 mag n/a MPO311355  

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