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8231 Tetsujiyamada (1997 TX17)
Classification: Main-belt Asteroid          SPK-ID: 2008231
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 28 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .01107358759889678 1.8628e-08  
a 2.857387147638497 1.2159e-08 au
q 2.82574562075516 5.738e-08 au
i 2.971537599359887 7.7695e-07 deg
node 63.51709584418916 1.3352e-05 deg
peri 263.8905929619998 0.00012874 deg
M 347.1365577434343 0.00012595 deg
tp 2459263.538628793542
(2021-Feb-18.03862879)
0.00061714 TDB
period 1764.217222189639
4.83
1.1261e-05
3.083e-08
d
yr
n .2040565047614658 1.3025e-09 deg/d
Q 2.889028674521833 1.2293e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2122  
   data-arc span      16734 days (45.82 yr)  
   first obs. used      1975-01-17  
   last obs. used      2020-11-10  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .49822  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-12 20:26:55  

Additional Information
 Earth MOID = 1.81256 au 
 Jupiter MOID = 2.11801 au 
 T_jup = 3.301 
[ 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 13.01   n/a E2021B10  
diameter diameter 7.316 km 0.126 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  
geometric albedo albedo 0.250   0.038 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

8231 Tetsujiyamada           Discovered 1997 Oct. 6 by K. Endate and K. Watanabe at Kitami.
Named in honor of Tetsuji Yamada (b. 1952), a well-known amateur astronomer in western Japan and the first secretary of the Fukuoka Astronomical Society (1977-1981). He has a large astronomical following, complementing his strong interest in astronomy education. His major interests include observing planets and comets. Name proposed by the discoverers following a suggestion by Y. Yamada.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 19990728/MPCPages.arcLast Updated: 2010-06-11

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Alternate Designations
 1997 TX17 = 1975 BQ = 1978 WZ16 = 1982 QA4 = 1990 FT5 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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