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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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1041223452250974 6.7748e-08  
a 2.582175658379613 3.2307e-08 AU
q 2.313313473045968 1.7719e-07 AU
i 2.249272760176364 1.0706e-05 deg
node 5.514005463491632 0.00016105 deg
peri 248.5002083276747 0.00016985 deg
M 7.202977338529647 4.9304e-05 deg
tp 2456970.175988773849
(2014-Nov-08.67598877)
0.0002076 JED
period 1515.573842363754
4.15
2.8443e-05
7.787e-08
d
yr
n .237533790790773 4.4579e-09 deg/d
Q 2.851037843713259 3.5671e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      249  
   data-arc span      6295 days (17.23 yr)  
   first obs. used      1997-02-09  
   last obs. used      2014-05-06  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47363  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 17:47:03  

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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