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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1110026531952918 6.2323e-08  
a 3.006273928453415 3.4552e-08 AU
q 2.672569546163253 1.8276e-07 AU
i 10.0868998922233 8.3943e-06 deg
node 339.9302042983929 3.6953e-05 deg
peri 68.59718355798321 5.3572e-05 deg
M 168.0726731155338 4.068e-05 deg
tp 2455911.634890512899
(2011-Dec-16.13489051)
0.00020892 JED
period 1903.887368979922
5.21
3.2823e-05
8.986e-08
d
yr
n .1890868156727586 3.2599e-09 deg/d
Q 3.339978310743577 3.8387e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      627  
   data-arc span      6352 days (17.39 yr)  
   first obs. used      1997-01-09  
   last obs. used      2014-06-01  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .6098  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-16 14:28:56  

Additional Information
 Earth MOID = 1.70066 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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