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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 ]

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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 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 
[ 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 15.25   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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