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19707 Tokunai (1999 TZ12)
Classification: Main-belt Asteroid          SPK-ID: 2019707
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 34 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .189317117462054 3.5662e-08  
a 2.25222054285593 5.8748e-09 au
q 1.825836641793623 8.1011e-08 au
i 4.69262874216346 3.1869e-06 deg
node 81.29073700339902 4.798e-05 deg
peri 274.6298319408593 4.8813e-05 deg
M 66.1238661058652 8.0842e-06 deg
tp 2458773.737865124671
(2019-Oct-17.23786512)
2.7843e-05 TDB
period 1234.567386371824
3.38
4.8304e-06
1.322e-08
d
yr
n .2916001216085713 1.1409e-09 deg/d
Q 2.678604443918238 6.987e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2300  
   data-arc span      13599 days (37.23 yr)  
   first obs. used      1982-11-10  
   last obs. used      2020-02-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .46618  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 22:54:27  

Additional Information
 Earth MOID = .82879 au 
 Jupiter MOID = 2.77111 au 
 T_jup = 3.598 
[ 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 13.7   n/a MPO435882  

19707 Tokunai           Discovered 1999 Oct. 8 by T. Okuni at Nanyo.
Tokunai Mogami (1755-1836) explored the northern area of Japan and learned astronomy, surveying and navigation from Toshiaki Honda, a Dutch scholar. He was engaged in the investigation and development of Hokkaido, Kurile Islands and Sakhalin.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040713/MPCPages.arcLast Updated: 2004-07-14

[ show close-approach data ]
Alternate Designations
 1999 TZ12 = 1982 VF9 = 1992 QG1 = 1998 HC83 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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