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21188 Kiyohiro (1994 GN)
Classification: Main-belt Asteroid          SPK-ID: 2021188
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 35 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1394669404923602 1.2514e-08  
a 2.26941165445693 6.3353e-09 au
q 1.952903754292116 2.7887e-08 au
i 5.542085911871028 6.3455e-07 deg
node 71.85088001086666 6.621e-06 deg
peri 203.795011151847 1.0231e-05 deg
M 220.557909945018 6.7515e-06 deg
tp 2459684.181783254071
(2022-Apr-14.68178325)
2.4228e-05 TDB
period 1248.72943243183
3.42
5.2289e-06
1.432e-08
d
yr
n .2882930366259731 1.2072e-09 deg/d
Q 2.585919554621743 7.2188e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2199  
   data-arc span      9848 days (26.96 yr)  
   first obs. used      1994-03-18  
   last obs. used      2021-03-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48102  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Mar-17 02:55:11  

Additional Information
 Earth MOID = .936245 au 
 Jupiter MOID = 2.51218 au 
 T_jup = 3.595 
[ 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 14.06   n/a E2021B10  
diameter diameter 3.846 km 0.076 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.157   0.029 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21188 Kiyohiro           Discovered 1994 Apr. 5 by K. Endate and K. Watanabe at Kitami.
Kiyohiro Kozai (b. 1964) is well known as an enthusiastic amateur astronomer in Kagawa Prefecture. He is a popular lecturer to the families that come to hear him at the astronomical classrooms of his local community center.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: MPC batch dated 2018-05-29Last Updated: 2018-09-17

[ show close-approach data ]
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