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22171 Choi (2000 WK179)
Classification: Main-belt Asteroid          SPK-ID: 2022171
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 31 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .09066873435364575 2.997e-08  
a 2.574236510119793 1.0753e-08 au
q 2.340833743820285 8.0096e-08 au
i 8.449511655073701 3.766e-06 deg
node 126.4113407616108 2.5969e-05 deg
peri 337.8356979451769 3.7495e-05 deg
M 276.4750094977881 2.815e-05 deg
tp 2459550.513688584727
(2021-Dec-02.01368858)
0.00011891 TDB
period 1508.589550658673
4.13
9.4521e-06
2.588e-08
d
yr
n .2386334969924846 1.4952e-09 deg/d
Q 2.8076392764193 1.1727e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1429  
   data-arc span      11721 days (32.09 yr)  
   first obs. used      1989-01-04  
   last obs. used      2021-02-06  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .53062  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:01:50  

Additional Information
 Earth MOID = 1.35971 au 
 Jupiter MOID = 2.28974 au 
 T_jup = 3.407 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.6   n/a MPO439250  
diameter diameter 7.528 km 0.063 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
rotation period rot_per 72.498 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]
geometric albedo albedo 0.037   0.006 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

22171 Choi           Discovered 2000 Nov. 26 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Diane Jeehea Choi (b. 1988) is a finalist in the 2006 Intel Science Talent Search (STS), a science competition for high school seniors, for her behavioral and social sciences project. She attends the Syosset High School, Syosset, New York.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060314/MPCPages.arcLast Updated: 2006-03-23

Alternate Designations
 2000 WK179 = 1989 AJ5 = 1998 HX120 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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