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JPL Small-Body Database Browser
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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 | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 25 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .183726946853541 3.3375e-08  
a 2.291008454797878 8.4463e-09 au
q 1.870088466182215 7.6501e-08 au
i 4.80457717427593 4.0728e-06 deg
node 280.5070334804733 4.9607e-05 deg
peri 50.34183672661022 5.1272e-05 deg
M 119.8446956855353 1.3267e-05 deg
tp 2458578.847401622548
(2019-Apr-05.34740162)
4.6108e-05 TDB
period 1266.597028325583
3.47
7.0044e-06
1.918e-08
d
yr
n .2842261523982203 1.5718e-09 deg/d
Q 2.71192844341354 9.9982e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1074  
   data-arc span      24215 days (66.30 yr)  
   first obs. used      1953-10-12  
   last obs. used      2020-01-29  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52257  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-23 10:39:33  

Additional Information
 Earth MOID = .863415 au 
 Jupiter MOID = 2.64058 au 
 T_jup = 3.571 
[ 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 15.2   n/a MPO502510  

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

[ show close-approach data ]
Alternate Designations
 1998 UK21 = 2001 LL3 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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