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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 ]

[ show orbit diagram ]
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 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457280.5 (2015-Sep-15.0) TDB
Reference: JPL 42 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1904199612077198 1.8626e-08  
q 1.822864938836507 4.2269e-08 au
tp 2457539.297030212069
(2016-May-30.79703021)
1.701e-05 TDB
node 81.310190851794 4.3805e-06 deg
peri 274.636363888309 6.8404e-06 deg
i 4.692003354791309 5.0851e-07 deg
  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
 Jupiter MOID = 2.77147 au 
 T_jup = 3.598 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.469219474418797E-16 -7.830517167813644E-16 2.720199380778103E-14 -2.084915920843437E-15 3.786915757379301E-14 3.859612067260622E-15
q -7.830517167813644E-16 1.786670631998778E-15 -7.334205905423595E-14 4.879918419002567E-15 -9.007667813428477E-14 -8.658943693218865E-15
tp 2.720199380778103E-14 -7.334205905423595E-14 2.893386083369673E-10 -1.005796754759527E-11 8.639488410672597E-11 -5.161408055043332E-12
node -2.084915920843437E-15 4.879918419002567E-15 -1.005796754759527E-11 1.91890354029826E-11 -2.132101936444751E-11 2.61976987014397E-13
peri 3.786915757379301E-14 -9.007667813428477E-14 8.639488410672597E-11 -2.132101936444751E-11 4.679168391817382E-11 -1.158052509090325E-12
i 3.859612067260622E-15 -8.658943693218865E-15 -5.161408055043332E-12 2.61976987014397E-13 -1.158052509090325E-12 2.585860232403481E-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 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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