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

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

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 two-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.

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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 2459000.5 (2020-May-31.0) TDB
Reference: JPL 26 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07402226672903738 3.8324e-08  
a 2.779775454806359 1.4071e-08 au
q 2.574010174643852 1.079e-07 au
i .6905050919929259 4.0428e-06 deg
node 130.751866991481 0.0003659 deg
peri 267.8210165590261 0.00036712 deg
M 327.6247385667903 3.0338e-05 deg
tp 2459152.738250304874
(2020-Oct-30.23825030)
0.00014306 TDB
period 1692.828650135198
4.63
1.2854e-05
3.519e-08
d
yr
n .2126618071895513 1.6147e-09 deg/d
Q 2.985540734968867 1.5113e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1276  
   data-arc span      9913 days (27.14 yr)  
   first obs. used      1992-09-26  
   last obs. used      2019-11-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .55835  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Dec-14 01:54:45  

Additional Information
 Earth MOID = 1.58146 au 
 Jupiter MOID = 2.32002 au 
 T_jup = 3.330 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 14.3   n/a MPO435966  
diameter diameter 7.703 km 0.135 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.082   0.009 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

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

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