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9105 Matsumura (1997 AU)
Classification: Main-belt Asteroid          SPK-ID: 2009105
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08827713779051806 5.4147e-08  
a 2.880378021705393 2.3604e-08 au
q 2.626106494194527 1.6129e-07 au
i 2.169424532891445 5.5025e-06 deg
node 20.32707448225189 0.00014742 deg
peri 337.315032205779 0.00015128 deg
M 73.18609457674501 3.3014e-05 deg
tp 2457037.506597808030
(2015-Jan-15.00659781)
0.00016424 JED
period 1785.552645551773
4.89
2.1948e-05
6.009e-08
d
yr
n .2016182501797658 2.4783e-09 deg/d
Q 3.13464954921626 2.5687e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1026  
   data-arc span      8311 days (22.75 yr)  
   first obs. used      1993-03-19  
   last obs. used      2015-12-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51854  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:09:23  

Additional Information
 Earth MOID = 1.62022 au 
 Jupiter MOID = 2.25942 au 
 T_jup = 3.288 
[ 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 14.0 mag n/a MPO358718  

9105 Matsumura           Discovered 1997 Jan. 2 by T. Kobayashi at Oizumi.
Masafumi Matsumura (b. 1959), associate professor at Kagawa University, studies interstellar matter on the basis of optical polarimetry and on light scattering calculations. He also works for astronomy education.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20030806/MPCPages.arcLast Updated: 2003-10-02

Alternate Designations
 1997 AU = 1993 FA43 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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