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9191 Hokuto (1991 XU)
Classification: Main-belt Asteroid          SPK-ID: 2009191
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 13 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .111785684848667 5.5221e-08  
a 2.600478052581946 1.7886e-08 au
q 2.309781832540145 1.4668e-07 au
i 11.92445041216765 7.3175e-06 deg
node 288.0587044582111 2.6241e-05 deg
peri 254.3170314885313 4.3024e-05 deg
M 245.9049577885264 3.6322e-05 deg
tp 2458085.947745670607
(2017-Nov-28.44774567)
0.00015591 JED
period 1531.715884003977
4.19
1.5803e-05
4.327e-08
d
yr
n .2350305325939058 2.4248e-09 deg/d
Q 2.891174272623747 1.9886e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1043  
   data-arc span      8786 days (24.05 yr)  
   first obs. used      1991-12-13  
   last obs. used      2016-01-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .50972  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:33:19  

Additional Information
 Earth MOID = 1.34677 au 
 Jupiter MOID = 2.23236 au 
 T_jup = 3.376 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 12.5 mag n/a MPO350875  

9191 Hokuto           Discovered 1991 Dec. 13 by S. Otomo at Kiyosato.
Hokuto-shi is the largest city in Yamanashi-ken in Japan. The city, home to the discoverer, is famous for its beautiful starlit sky.
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

Alternate Designations
 1991 XU = 1995 WV41 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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