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23649 Tohoku (1997 CJ5)
Classification: Main-belt Asteroid          SPK-ID: 2023649
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 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1521872400042401 3.6963e-08  
a 2.387338119348187 9.149e-09 au
q 2.024015720007673 8.8401e-08 au
i .4347851692881186 3.6802e-06 deg
node 289.9523457567934 0.00057549 deg
peri 306.8658468359899 0.00057563 deg
M 136.9428609884674 1.3415e-05 deg
tp 2458883.985423360257
(2020-Feb-04.48542336)
4.9326e-05 TDB
period 1347.315561092635
3.69
7.745e-06
2.12e-08
d
yr
n .2671979827116747 1.536e-09 deg/d
Q 2.7506605186887 1.0541e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1137  
   data-arc span      10622 days (29.08 yr)  
   first obs. used      1991-10-06  
   last obs. used      2020-11-04  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52136  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:27:50  

Additional Information
 Earth MOID = 1.0126 au 
 Jupiter MOID = 2.24843 au 
 T_jup = 3.518 
[ 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 15.69   n/a E2021B10  

23649 Tohoku           Discovered 1997 Feb. 1 by N. Sato at Chichibu.
Tohoku is the name of the northeastern part of Honshu island, Japan. The Great East Japan Earthquake of 2011 March 11 occurred offshore. About 25000 lives were lost and many facilities were demolished.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20110615/MPCPages.arcLast Updated: 2013-03-28

Alternate Designations
 1997 CJ5 = 1999 XR51 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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