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52987 (1998 UK21)
Classification: Main-belt Asteroid          SPK-ID: 2052987
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 30 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1837995437678832 3.2886e-08  
a 2.290995498042046 8.1737e-09 au
q 1.869911570727643 7.5616e-08 au
i 4.804265676896931 3.6843e-06 deg
node 280.5051215885341 4.6676e-05 deg
peri 50.37188902629075 4.8143e-05 deg
M 176.6470105378397 1.2822e-05 deg
tp 2458579.003665079252
(2019-Apr-05.50366508)
4.393e-05 TDB
period 1266.586283516765
3.47
6.7783e-06
1.856e-08
d
yr
n .2842285635688671 1.5211e-09 deg/d
Q 2.712079425356448 9.6761e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1200  
   data-arc span      24634 days (67.44 yr)  
   first obs. used      1953-10-12  
   last obs. used      2021-03-23  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .51441  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 06:20:46  

Additional Information
 Earth MOID = .861333 au 
 Jupiter MOID = 2.64049 au 
 T_jup = 3.571 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.21   n/a MPCxxxxx  

52987 (1998 UK21)          Discovered 1998-Oct-28 by LINEAR at Socorro
Reference: 20030216/Numbers.arcLast Updated: 2004-04-19

Alternate Designations
 1998 UK21 = 2001 LL3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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