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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 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1107953843294324 5.9825e-08  
a 3.006840641217237 3.3536e-08 AU
q 2.673696576756217 1.7715e-07 AU
i 10.08655373356275 8.1546e-06 deg
node 339.9236909837963 3.6759e-05 deg
peri 68.59407213760083 5.3149e-05 deg
M 205.8936475356019 4.0949e-05 deg
tp 2457815.733626190686
(2017-Mar-03.23362619)
0.00022349 JED
period 1904.425747124526
5.21
3.1861e-05
8.723e-08
d
yr
n .189033361129233 3.1625e-09 deg/d
Q 3.339984705678258 3.7252e-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 = 1.70266 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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