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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 5 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .111002658087904 6.8521e-08  
a 3.006273951550539 3.808e-08 AU
q 2.672569551988002 2.024e-07 AU
i 10.08691334628149 9.3538e-06 deg
node 339.930223900521 4.0582e-05 deg
peri 68.59718871753623 5.9764e-05 deg
M 168.072650729348 4.4216e-05 deg
tp 2455911.634998660256
(2011-Dec-16.13499866)
0.00022911 JED
period 1903.887390921197
5.21
3.6174e-05
9.904e-08
d
yr
n .1890868134936351 3.5927e-09 deg/d
Q 3.339978351113075 4.2307e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      613  
   data-arc span      6295 days (17.23 yr)  
   first obs. used      1997-01-09  
   last obs. used      2014-04-05  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .59801  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:31:10  

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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