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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1041223357876984 6.5724e-08  
a 2.582175662798297 3.1365e-08 AU
q 2.31331350137359 1.7017e-07 AU
i 2.249271305493306 1.0359e-05 deg
node 5.513990648305064 0.00015887 deg
peri 248.5002253161722 0.00016773 deg
M 7.202973682863599 4.8862e-05 deg
tp 2456970.176004086100
(2014-Nov-08.67600409)
0.00020575 JED
period 1515.573846253986
4.15
2.7614e-05
7.56e-08
d
yr
n .2375337901810624 4.3279e-09 deg/d
Q 2.851037824223003 3.4631e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      253  
   data-arc span      6710 days (18.37 yr)  
   first obs. used      1997-02-09  
   last obs. used      2015-06-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47157  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 14:52:29  

Additional Information
 Earth MOID = 1.30144 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 16.3 mag n/a MPO280655  

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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