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12391 Ecoadachi (1994 WE2)
Classification: Main-belt Asteroid          SPK-ID: 2012391
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 17 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2164577675521859 6.2321e-08  
a 2.746043821855314 2.1044e-08 au
q 2.15164130657604 1.7388e-07 au
i 9.119790107898984 5.5554e-06 deg
node 96.72070148709314 4.1501e-05 deg
peri 266.7059432459018 4.3521e-05 deg
M 273.1973852053374 1.5416e-05 deg
tp 2457801.265131865125
(2017-Feb-16.76513187)
7.3325e-05 JED
period 1662.109463093229
4.55
1.9106e-05
5.231e-08
d
yr
n .2165922329387564 2.4897e-09 deg/d
Q 3.340446337134588 2.5599e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1067  
   data-arc span      12185 days (33.36 yr)  
   first obs. used      1982-01-26  
   last obs. used      2015-06-07  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52661  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jul-06 12:09:33  

Additional Information
 Earth MOID = 1.17077 au 
 Jupiter MOID = 2.18529 au 
 T_jup = 3.295 
[ 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 12.9 mag n/a MPO337363  
rotation period rot_per 36.9309 h n/a LCDB (Rev. 2015-December); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Waszczak, A.; Chang, C.-K.; Ofeck, E.O.; Laher, F.; et al. (2015) Astron. J. 150, A75.]

12391 Ecoadachi           Discovered 1994 Nov. 26 by K. Endate and K. Watanabe at Kitami.
Adachi Ward is one of 23 wards of Tokyo and is located in a natural environment in the city. The public administration and its inhabitants proceed together to preserve the native environment so that it may be passed to the next generation.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080819/MPCPages.arcLast Updated: 2008-08-25

[ show close-approach data ]
Alternate Designations
 1994 WE2 = 1982 BN7 = 1991 CN6 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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