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103220 Kwongchuikuen (1999 YQ4)
Classification: Main-belt Asteroid          SPK-ID: 2103220
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1901433940680007 4.7507e-08  
a 2.67447798020252 1.5032e-08 au
q 2.165943659686681 1.319e-07 au
i 9.8871370771021 4.9834e-06 deg
node 305.2248913596143 2.6356e-05 deg
peri 162.930139520862 3.0094e-05 deg
M 284.8488060068029 1.712e-05 deg
tp 2459533.995786259166
(2021-Nov-15.49578626)
7.7809e-05 TDB
period 1597.559222600876
4.37
1.3469e-05
3.688e-08
d
yr
n .2253437587208247 1.8999e-09 deg/d
Q 3.183012300718358 1.7891e-08 au
  Orbit Determination Parameters
   # obs. used (total)      724  
   data-arc span      7729 days (21.16 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55181  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:45:41  

Additional Information
 Earth MOID = 1.1845 au 
 Jupiter MOID = 1.94818 au 
 T_jup = 3.332 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457467.5 (2016-Mar-20.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .187847150870898 4.6945e-08  
q 2.174539236381946 1.3013e-07 au
tp 2457930.709569700693
(2017-Jun-26.20956970)
7.1054e-05 TDB
node 305.4110056814755 2.6446e-05 deg
peri 162.0227415412165 3.0306e-05 deg
i 9.861479205262158 4.9738e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      724  
   data-arc span      7729 days (21.16 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-01-13  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .55181  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 15:45:41  

Additional Information
 Jupiter MOID = 1.94818 au 
 T_jup = 3.332 
Orbit Covariance (6×6)
  e q tp node peri i
e 2.203869626697978E-15 -6.084663802439992E-15 -1.954791446025384E-13 -8.731284150014575E-15 9.259066646272094E-14 -5.578623958493315E-16
q -6.084663802439992E-15 1.693283487678458E-14 1.006693407937613E-12 2.443506952041175E-14 -1.689142595116093E-13 3.032995304218421E-15
tp -1.954791446025384E-13 1.006693407937613E-12 5.048667981622563E-9 -1.526970656700445E-11 1.05407257089157E-9 1.013812379504455E-11
node -8.731284150014575E-15 2.443506952041175E-14 -1.526970656700445E-11 6.993833761222538E-10 -6.926431393376332E-10 4.088011455505137E-11
peri 9.259066646272094E-14 -1.689142595116093E-13 1.05407257089157E-9 -6.926431393376332E-10 9.184797922272532E-10 -3.836531963281387E-11
i -5.578623958493315E-16 3.032995304218421E-15 1.013812379504455E-11 4.088011455505137E-11 -3.836531963281387E-11 2.473862441953873E-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 15.25   n/a E2021B55  

103220 Kwongchuikuen           Discovered 1999 Dec. 28 by W. K. Y. Yeung at Rock Finder Observatory.
Kwong Chui Kuen (b. 1960), a producer of documentaries for television, is the wife of the discoverer. This is the chronologically earliest minor planet credited to the discoverer.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080618/MPCPages.arcLast Updated: 2008-06-20

[ show close-approach data ]
Alternate Designations
 1999 YQ4 = 2002 PC21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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