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JPL Small-Body Database Browser
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7176 Kuniji (1989 XH)
Classification: Main-belt Asteroid          SPK-ID: 2007176
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

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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.

Note: If the applet is not working, here are some notes that might help.
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 .1374745706116922 3.7474e-08  
a 2.764825987808308 1.432e-08 au
q 2.384732722318313 1.0146e-07 au
i 7.939546230735404 4.2734e-06 deg
node 246.745515964406 3.2908e-05 deg
peri 173.8370032823371 3.6975e-05 deg
M 242.9518519427219 1.7996e-05 deg
tp 2459546.461699722941
(2021-Nov-27.96169972)
8.5572e-05 TDB
period 1679.191129141811
4.60
1.3046e-05
3.572e-08
d
yr
n .2143889362874291 1.6656e-09 deg/d
Q 3.144919253298303 1.6289e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1692  
   data-arc span      11749 days (32.17 yr)  
   first obs. used      1987-05-30  
   last obs. used      2019-07-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49194  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Feb-22 18:22:35  

Additional Information
 Earth MOID = 1.39775 au 
 Jupiter MOID = 2.1764 au 
 T_jup = 3.312 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.9   n/a MPO448985  
diameter diameter 6.729 km 0.497 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.324   0.078 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

7176 Kuniji          
Named in honor of Kuniji Saito (b. 1913), who joined the Tokyo Astronomical Observatory in 1936 and was engaged mainly in research on the solar corona. Following his retirement in 1974, he has collected historical materials from Japan, China and other countries to analyze them from the viewpoint of modern astronomy, using computers. He named this field of research "paleoastronomy" and hopes that many other researchers will enter into this kind of research. He also served as president of the Astronomical Society of Japan. Name proposed by the discoverers following a suggestion by A. Fujii and A. Tanno.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19981005/MPCPages.arcLast Updated: 2009-11-17

Alternate Designations
 1989 XH = 1987 KL1 = 1993 TR39 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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