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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 27 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1374745688894945 3.7359e-08  
a 2.764825987449464 1.4289e-08 au
q 2.384732726770378 1.0119e-07 au
i 7.939546248478504 4.2674e-06 deg
node 246.7455146770431 3.2828e-05 deg
peri 173.8370050060045 3.6893e-05 deg
M 242.9518516513983 1.799e-05 deg
tp 2459546.461700975507
(2021-Nov-27.96170098)
8.5551e-05 TDB
period 1679.191128814901
4.60
1.3017e-05
3.564e-08
d
yr
n .2143889363291671 1.662e-09 deg/d
Q 3.14491924812855 1.6253e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1700  
   data-arc span      12021 days (32.91 yr)  
   first obs. used      1987-05-30  
   last obs. used      2020-04-27  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .49191  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-May-20 02:43:11  

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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