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31203 Hersman (1998 AO9)
Classification: Main-belt Asteroid          SPK-ID: 2031203
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08649933303592076 8.2003e-08  
a 2.920712588988463 3.1817e-08 au
q 2.668072898051344 2.4808e-07 au
i 2.643014726683952 7.8807e-06 deg
node 42.87849817456701 0.0001289 deg
peri 329.2951969360946 0.00013429 deg
M 322.0198340188947 3.9444e-05 deg
tp 2457592.847266291179
(2016-Jul-23.34726629)
0.00020126 JED
period 1823.188869139568
4.99
2.9792e-05
8.157e-08
d
yr
n .1974562296279802 3.2265e-09 deg/d
Q 3.173352279925583 3.4569e-08 au
  Orbit Determination Parameters
   # obs. used (total)      614  
   data-arc span      14122 days (38.66 yr)  
   first obs. used      1976-10-22  
   last obs. used      2015-06-22  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .56941  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:47:47  

Additional Information
 Earth MOID = 1.66681 au 
 Jupiter MOID = 2.28051 au 
 T_jup = 3.273 
[ 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 14.6 mag n/a MPO263608  

31203 Hersman           Discovered 1998 Jan. 6 by M. W. Buie at the Anderson Mesa station of the Lowell Observatory.
Chris Becker Hersman (b. 1964) is the spacecraft systems engineer of the New Horizons Pluto Kuiper Belt mission. In this role he is making a fundamental contribution to the exploration of the solar system.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20040713/MPCPages.arcLast Updated: 2004-07-14

Alternate Designations
 1998 AO9 = 1976 UR10 = 1994 HE1 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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