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29249 Hiraizumi (1992 SN12)
Classification: Main-belt Asteroid          SPK-ID: 2029249
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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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 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07557984805057061 5.4698e-08  
a 2.780116558671541 1.88e-08 au
q 2.569995771604271 1.5493e-07 au
i .6902473555170925 4.9119e-06 deg
node 130.681798329256 0.00048919 deg
peri 265.8041650299317 0.00049078 deg
M 32.33614753836926 3.5617e-05 deg
tp 2457448.417686490930
0.00016719 JED
period 1693.140248024313
n .2126226698704233 2.1567e-09 deg/d
Q 2.990237345738811 2.0221e-08 au
  Orbit Determination Parameters
   # obs. used (total)      964  
   data-arc span      8499 days (23.27 yr)  
   first obs. used      1992-09-26  
   last obs. used      2016-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57968  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 20:57:30  

Additional Information
 Earth MOID = 1.57542 au 
 Jupiter MOID = 2.33458 au 
 T_jup = 3.329 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3 mag n/a MPO347739  

29249 Hiraizumi           Discovered 1992 Sept. 26 by T. Seki at Geisei.
The town of Hiraizumi in Iwate prefecture reached the height of its prosperity during the twelfth century as the home of the Fujiwara family in Oshu province. The Golden Hall (Konjikido) of Chusonji and the ruins of Motsuji temple are reminiscent of its glory.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100527/MPCPages.arcLast Updated: 2010-12-06

[ show close-approach data ]
Alternate Designations
 1992 SN12 = 1994 CD = 1996 NC2 = 1997 WA34 = 1999 FH42 = 2000 KL26 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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