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115487 (2003 UK21)
Classification: Main-belt Asteroid          SPK-ID: 2115487
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09178603382467719 5.7392e-08  
a 2.879709900010946 2.1965e-08 au
q 2.615392749723283 1.7312e-07 au
i 5.509408622708306 6.308e-06 deg
node 331.9893132883915 3.9823e-05 deg
peri 13.27957035266152 4.5532e-05 deg
M 230.0530863441107 2.3296e-05 deg
tp 2459844.795360976342
(2022-Sep-22.29536098)
0.00011793 TDB
period 1784.931426426158
4.89
2.0422e-05
5.591e-08
d
yr
n .2016884204458222 2.3076e-09 deg/d
Q 3.144027050298608 2.3981e-08 au
  Orbit Determination Parameters
   # obs. used (total)      623  
   data-arc span      7886 days (21.59 yr)  
   first obs. used      1998-10-19  
   last obs. used      2020-05-22  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53629  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 16:43:47  

Additional Information
 Earth MOID = 1.60625 au 
 Jupiter MOID = 2.22285 au 
 T_jup = 3.282 
[ 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 15.16   n/a E2021B55  

115487 (2003 UK21)          Discovered 2003-Oct-18 by LONEOS at Anderson Mesa
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

[ show close-approach data ]
Alternate Designations
 2003 UK21 = 2001 FC192 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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