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22914 Tsunanmachi (1999 TU36)
Classification: Main-belt Asteroid          SPK-ID: 2022914
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .3050103020387455 3.835e-08  
a 3.115603846921085 2.1217e-08 au
q 2.165312576538607 1.2012e-07 au
i 15.26760565192653 4.6446e-06 deg
node 157.6966039178703 1.705e-05 deg
peri 225.4169248049755 1.8598e-05 deg
M 322.4474595413037 1.047e-05 deg
tp 2459410.031149664244
(2021-Jul-14.53114966)
5.9968e-05 TDB
period 2008.684711014264
5.50
2.0519e-05
5.618e-08
d
yr
n .1792217554233396 1.8308e-09 deg/d
Q 4.065895117303563 2.7689e-08 au
  Orbit Determination Parameters
   # obs. used (total)      895  
   data-arc span      13853 days (37.93 yr)  
   first obs. used      1982-08-14  
   last obs. used      2020-07-18  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49972  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 04:14:42  

Additional Information
 Earth MOID = 1.19363 au 
 Jupiter MOID = 1.54625 au 
 T_jup = 3.092 
[ 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 14.40   n/a E2021B10  
diameter diameter 5.414 km 0.152 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  
geometric albedo albedo 0.126   0.023 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2012ApJ...759L...8M)  

22914 Tsunanmachi           Discovered 1999 Oct. 13 by the Lowell Observatory Near-Earth Object Search at the Anderson Mesa Station.
Tsunanmachi, a town in Niigata prefecture, Japan, is famous for its Koshihikari rice. The town was heavily damaged during the 2011 earthquake.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20120506/MPCPages.arcLast Updated: 2012-05-09

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