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129561 Chuhachi (1997 CS21)
Classification: Main-belt Asteroid          SPK-ID: 2129561
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 14 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .104475547414497 5.9092e-08  
a 2.582140022307549 2.8013e-08 au
q 2.312369529976086 1.4647e-07 au
i 2.249177060681274 9.4007e-06 deg
node 5.509443916345042 0.00014338 deg
peri 248.4592746925405 0.00015296 deg
M 149.7267273455456 4.738e-05 deg
tp 2456970.174405749128
(2014-Nov-08.67440575)
0.00020121 JED
period 1515.542468290413
4.15
2.4663e-05
6.752e-08
d
yr
n .2375387081076606 3.8655e-09 deg/d
Q 2.851910514639011 3.094e-08 au
  Orbit Determination Parameters
   # obs. used (total)      305  
   data-arc span      6847 days (18.75 yr)  
   first obs. used      1997-02-09  
   last obs. used      2015-11-09  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49258  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-26 06:52:47  

Additional Information
 Earth MOID = 1.29877 au 
 Jupiter MOID = 2.18074 au 
 T_jup = 3.415 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 16.4 mag n/a MPO348253  

129561 Chuhachi           Discovered 1997 Feb. 9 by A. Nakamura at Kuma Kogen.
In 1891 a self-taught aviation engineer, Chuhachi Ninomiya (1866-1936) became the first Japanese to fly a propeller-driven model aircraft. A manpowered aircraft, not completed in Ninomiya's time because of the lack of funds, was manufactured in 1991 following his design, and it flew 50 meters.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091004/MPCPages.arcLast Updated: 2009-10-06

Alternate Designations
 1997 CS21 = 1999 TZ225 = 2001 AF1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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