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

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1115240560669815 6.0103e-08  
a 2.601044668435689 2.0178e-08 AU
q 2.310965617000344 1.6121e-07 AU
i 11.92521764367471 8.5799e-06 deg
node 288.0750767985039 2.7078e-05 deg
peri 254.1579382826395 4.7637e-05 deg
M 105.0922504815595 4.0443e-05 deg
tp 2456553.210880250446
(2013-Sep-17.71088025)
0.00017139 JED
period 1532.216527593481
4.19
1.7829e-05
4.881e-08
d
yr
n .2349537376191997 2.734e-09 deg/d
Q 2.891123719871034 2.2428e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      915  
   data-arc span      8651 days (23.69 yr)  
   first obs. used      1991-12-13  
   last obs. used      2015-08-20  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49502  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Sep-02 14:27:06  

Additional Information
 Earth MOID = 1.34962 AU 
 T_jup = 3.375 
[ 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 12.4 mag n/a MPO259407  

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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