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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1116978312640536 5.5261e-08  
a 2.600843528519319 1.7885e-08 au
q 2.310334946926563 1.468e-07 au
i 11.92395298113719 7.3425e-06 deg
node 288.0660350476923 2.6242e-05 deg
peri 254.2419793164759 4.3087e-05 deg
M 198.978025772583 3.6253e-05 deg
tp 2458085.755311836860
(2017-Nov-28.25531184)
0.00015615 JED
period 1532.038800573006
4.19
1.5803e-05
4.327e-08
d
yr
n .2349809938660525 2.4238e-09 deg/d
Q 2.891352110112076 1.9883e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1040  
   data-arc span      8757 days (23.98 yr)  
   first obs. used      1991-12-13  
   last obs. used      2015-12-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .51018  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 13:09:43  

Additional Information
 Earth MOID = 1.34801 au 
 Jupiter MOID = 2.23228 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 12.5 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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