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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1394371868468038 1.2356e-08  
a 2.269195855087157 6.2116e-09 au
q 1.952785568649376 2.7675e-08 au
i 5.541979790408624 6.3306e-07 deg
node 71.84531315217028 6.6177e-06 deg
peri 203.8495612233131 1.0017e-05 deg
M 277.0078951726205 6.7764e-06 deg
tp 2459684.333061961441
(2022-Apr-14.83306196)
2.4038e-05 TDB
period 1248.551323305322
3.42
5.1266e-06
1.404e-08
d
yr
n .2883341623850615 1.1839e-09 deg/d
Q 2.585606141524938 7.0778e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2357  
   data-arc span      9946 days (27.23 yr)  
   first obs. used      1994-03-18  
   last obs. used      2021-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47761  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:06:19  

Additional Information
 Earth MOID = .937824 au 
 Jupiter MOID = 2.51145 au 
 T_jup = 3.595 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457223.5 (2015-Jul-20.0) TDB
Reference: JPL 38 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1396533216631203 1.2333e-08  
q 1.952200086337393 2.7631e-08 au
tp 2457187.674140871028
(2015-Jun-14.17414087)
2.1184e-05 TDB
node 71.86499622377539 6.6184e-06 deg
peri 203.9315497274081 1.0019e-05 deg
i 5.542072655627682 6.3308e-07 deg
  Orbit Determination Parameters
   # obs. used (total)      2357  
   data-arc span      9946 days (27.23 yr)  
   first obs. used      1994-03-18  
   last obs. used      2021-06-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .47761  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 05:06:19  

Additional Information
 Jupiter MOID = 2.51145 au 
 T_jup = 3.595 
Orbit Covariance (6×6)
  e q tp node peri i
e 1.520911009460058E-16 -3.345503771338329E-16 1.730174139930295E-14 1.509391184254594E-14 -1.291390526520443E-14 -1.467096146977759E-15
q -3.345503771338329E-16 7.634783848262788E-16 -3.302574178455826E-14 -3.393129673372785E-14 3.116372167129461E-14 3.346210061754138E-15
tp 1.730174139930295E-14 -3.302574178455826E-14 4.487552661650648E-10 3.58304763687136E-12 1.594426720745486E-10 6.436060963989645E-13
node 1.509391184254594E-14 -3.393129673372785E-14 3.58304763687136E-12 4.380363293684659E-11 -4.215144303893002E-11 -1.24868416551963E-12
peri -1.291390526520443E-14 3.116372167129461E-14 1.594426720745486E-10 -4.215144303893002E-11 1.003887615296502E-10 1.361673728673596E-12
i -1.467096146977759E-15 3.346210061754138E-15 6.436060963989645E-13 -1.24868416551963E-12 1.361673728673596E-12 4.007961737589954E-13

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.10   n/a MPO636382  
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
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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