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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 ]

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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 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1893977213737443 1.8573e-08  
a 2.252422138725847 5.4281e-09 au
q 1.825818518079396 4.2131e-08 au
i 4.69230902207502 5.0868e-07 deg
node 81.28826683723007 4.3774e-06 deg
peri 274.6599808597725 6.8622e-06 deg
M 124.3994644507508 5.0245e-06 deg
tp 2458773.832937586276
(2019-Oct-17.33293759)
1.7011e-05 TDB
period 1234.733148949772
3.38
4.4633e-06
1.222e-08
d
yr
n .291560974374265 1.0539e-09 deg/d
Q 2.679025759372298 6.4561e-09 au
  Orbit Determination Parameters
   # obs. used (total)      2679  
   data-arc span      14010 days (38.36 yr)  
   first obs. used      1982-11-10  
   last obs. used      2021-03-20  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .45369  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 02:57:55  

Additional Information
 Earth MOID = .827108 au 
 Jupiter MOID = 2.77147 au 
 T_jup = 3.598 
[ 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 13.77   n/a MPCxxxxx  

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

Alternate Designations
 1999 TZ12 = 1982 VF9 = 1992 QG1 = 1998 HC83 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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