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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 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 18 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2165102130656357 6.2215e-08  
a 2.746479857177127 2.0985e-08 au
q 2.151838918119231 1.7368e-07 au
i 9.119232257064937 5.5187e-06 deg
node 96.72082865643362 4.1465e-05 deg
peri 266.6697109763327 4.3466e-05 deg
M 316.5501500934682 1.5625e-05 deg
tp 2457801.154467693095
(2017-Feb-16.65446769)
7.3263e-05 JED
period 1662.505360200447
4.55
1.9054e-05
5.217e-08
d
yr
n .2165406552172529 2.4818e-09 deg/d
Q 3.341120796235024 2.5528e-08 au
  Orbit Determination Parameters
   # obs. used (total)      1075  
   data-arc span      12497 days (34.21 yr)  
   first obs. used      1982-01-26  
   last obs. used      2016-04-14  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .52713  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Apr-25 13:13:59  

Additional Information
 Earth MOID = 1.17168 au 
 Jupiter MOID = 2.18448 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. 2016-February); 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. (2016) 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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