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12432 Usuda (1996 AR1)
Classification: Main-belt Asteroid          SPK-ID: 2012432
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using 2-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

Note: If the applet has stopped working because of a recent Java upgrade, here is a possible workaround.
Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).

Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .03818175348468737 6.1558e-08  
a 3.04940371547488 3.0097e-08 au
q 2.932972134535328 1.9246e-07 au
i 9.357975882452713 6.8137e-06 deg
node 306.6321242669603 4.3232e-05 deg
peri 100.8359032393002 0.00011391 deg
M 30.17246599220197 0.00010321 deg
tp 2457437.484417473106
0.00055765 JED
period 1945.005414037055
n .1850894590842211 2.7402e-09 deg/d
Q 3.165835296414431 3.1246e-08 au
  Orbit Determination Parameters
   # obs. used (total)      846  
   data-arc span      8221 days (22.51 yr)  
   first obs. used      1993-08-16  
   last obs. used      2016-02-18  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51996  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:49:59  

Additional Information
 Earth MOID = 1.96046 au 
 Jupiter MOID = 2.0227 au 
 T_jup = 3.216 
[ 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 13.4 mag n/a MPO350901  
rotation period rot_per 12.8621 h n/a LCDB (Rev. 2016-February); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2016) Astron. J. 150, A75.]

12432 Usuda           Discovered 1996 Jan. 12 by N. Sato and T. Urata at Chichibu.
The Usuda Deep Space Center of the Japan Aerospace Exploration Agency, located in Saku city, Nagano prefecture, conducts command operations and receives telemetry and data from deep-space explorers such as Hayabusa and Kaguya. The site features a parabolic antenna of diameter 64 meters and weight 1980 tons.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20091202/MPCPages.arcLast Updated: 2010-04-12

Alternate Designations
 1996 AR1 = 1998 MY41 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
FirstGov 2016-May-01 13:39 UT
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