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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 7 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1115240557037821 6.0104e-08  
a 2.601044662682664 2.0867e-08 AU
q 2.310965612833617 1.6126e-07 AU
i 11.92521880515296 8.9059e-06 deg
node 288.0750757416044 2.7167e-05 deg
peri 254.1579513006229 4.8925e-05 deg
M 105.0922412555919 4.1311e-05 deg
tp 2456553.210921001593
(2013-Sep-17.71092100)
0.00017539 JED
period 1532.216522510016
4.19
1.8438e-05
5.048e-08
d
yr
n .2349537383987104 2.8273e-09 deg/d
Q 2.89112371253171 2.3194e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      896  
   data-arc span      8569 days (23.46 yr)  
   first obs. used      1991-12-13  
   last obs. used      2015-05-30  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49822  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 16:04:30  

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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