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6906 Johnmills (1990 WC)
Classification: Main-belt Asteroid          SPK-ID: 2006906
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457600.5 (2016-Jul-31.0) TDB
Reference: JPL 12 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2724916989735748 9.4962e-08  
a 2.737020045446156 2.0615e-08 au
q 1.991204803137802 2.5615e-07 au
i 10.44758798142882 7.7182e-06 deg
node 68.16202515239912 4.4024e-05 deg
peri 347.0837234662336 4.574e-05 deg
M 226.5411702222825 1.6267e-05 deg
tp 2458213.640785247893
(2018-Apr-05.14078525)
7.854e-05 JED
period 1653.923408866088
4.53
1.8686e-05
5.116e-08
d
yr
n .2176642509986675 2.4592e-09 deg/d
Q 3.48283528775451 2.6233e-08 au
  Orbit Determination Parameters
   # obs. used (total)      738  
   data-arc span      15591 days (42.69 yr)  
   first obs. used      1972-12-02  
   last obs. used      2015-08-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .5023  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Feb-25 18:21:27  

Additional Information
 Earth MOID = 1.00308 au 
 Jupiter MOID = 1.89208 au 
 T_jup = 3.274 
[ 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 13.1 mag n/a MPO279587  
SMASSII spectral type spec_B C   n/a EAR-A-5-DDR-TAXONOMY-V4.0 based on a high-resolution spectrum by Xu et al. (1995) or Bus and Binzel (2002)

6906 Johnmills           Discovered 1990 Nov. 19 by R. H. McNaught at Siding Spring.
John Mills (1806-1899), twine manufacturer and amateur astronomer, left funds for the creation of Britain's first public observatory. The Mills Observatory in his home town of Dundee was eventually built in 1935.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20070106/MPCPages.arcLast Updated: 2007-01-09

[ show close-approach data ]
Alternate Designations
 1990 WC = 1972 XK = 1978 EA4 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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