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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456875.5 (2014-Aug-06.0) TDB
Reference: JPL 21 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08842944237731576 5.7047e-08  
q 2.629657586953554 1.7119e-07 au
tp 2456266.064159803909
(2012-Dec-04.56415980)
0.00011534 TDB
node 332.0402093286998 3.9843e-05 deg
peri 12.34742578192225 4.6007e-05 deg
i 5.50656820385344 6.3008e-06 deg
  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
 Jupiter MOID = 2.22285 au 
 T_jup = 3.282 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.254324181461307E-15 -9.706387540734705E-15 -1.590276839492301E-12 3.067673220330092E-15 -3.304227350685175E-13 2.828014544195953E-17
q -9.706387540734705E-15 2.930746861294838E-14 4.582761023961419E-12 -1.066259091991182E-14 9.796251332298046E-13 2.621548260256894E-16
tp -1.590276839492301E-12 4.582761023961419E-12 1.330273364228216E-8 -3.573217909182757E-12 2.658350890860966E-9 -1.137351870721303E-12
node 3.067673220330092E-15 -1.066259091991182E-14 -3.573217909182757E-12 1.587449931685441E-9 -1.580853083320321E-9 -8.696990716316764E-13
peri -3.304227350685175E-13 9.796251332298046E-13 2.658350890860966E-9 -1.580853083320321E-9 2.116607923169514E-9 6.760066608459507E-13
i 2.828014544195953E-17 2.621548260256894E-16 -1.137351870721303E-12 -8.696990716316764E-13 6.760066608459507E-13 3.969955757912183E-11

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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