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31087 Oirase (1997 AA22)
Classification: Main-belt Asteroid          SPK-ID: 2031087
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .110439347612747 5.9832e-08  
a 3.007888348441657 3.3793e-08 au
q 2.675699121547777 1.7718e-07 au
i 10.0863259011279 8.1545e-06 deg
node 339.9190268241065 3.6752e-05 deg
peri 68.44502212523746 5.3231e-05 deg
M 319.4044488051697 4.2007e-05 deg
tp 2457815.365622372226
(2017-Mar-02.86562237)
0.00022421 JED
period 1905.42120447552
5.22
3.211e-05
8.791e-08
d
yr
n .1889346036217186 3.1839e-09 deg/d
Q 3.340077575335537 3.7525e-08 au
  Orbit Determination Parameters
   # obs. used (total)      630  
   data-arc span      6732 days (18.43 yr)  
   first obs. used      1997-01-09  
   last obs. used      2015-06-16  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60865  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:47:36  

Additional Information
 Earth MOID = 1.7034 au 
 Jupiter MOID = 2.08549 au 
 T_jup = 3.218 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.8 mag n/a MPO263607  

31087 Oirase           Discovered 1997 Jan. 9 by N. Sato at Chichibu.
Oirase is the name of a gorge which runs through Towada, a city in Aomori Prefecture. It is located in the northern region of Honshu, the main island of Japan. It was designated as a "Special Place of Scenic Beauty and Natural Treasure" in 1952 and attracts 2.5 million tourists annually.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20111210/MPCPages.arcLast Updated: 2011-12-12

[ show close-approach data ]
Alternate Designations
 1997 AA22 = 1998 FG106 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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