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12220 Semenchur (1982 UD6)
Classification: Main-belt Asteroid          SPK-ID: 2012220
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 8 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1486411815677803 5.2133e-08  
a 2.251196976516396 1.315e-08 AU
q 1.916576397985184 1.1966e-07 AU
i 3.190912299284207 6.7496e-06 deg
node 309.2029887617294 8.3812e-05 deg
peri 84.25542188561833 8.8723e-05 deg
M 128.6377487979724 2.8826e-05 deg
tp 2456359.656336818967
(2013-Mar-08.15633682)
9.6917e-05 JED
period 1233.725871512402
3.38
1.081e-05
2.96e-08
d
yr
n .2917990197925269 2.5568e-09 deg/d
Q 2.585817555047608 1.5105e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      983  
   data-arc span      11487 days (31.45 yr)  
   first obs. used      1982-10-20  
   last obs. used      2014-04-02  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .53813  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 14:01:52  

Additional Information
 Earth MOID = .924512 AU 
 T_jup = 3.610 
[ 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 14.4 mag n/a MPO279645  

12220 Semenchur           Discovered 1982 Oct. 20 by L. G. Karachkina at the Crimean Astrophysical Observatory.
Semen Ivanovich Churyumov (b. 1934), doctor of philosophy and socionics, was for many years senior lecturer in the mathematics department at the Kiev National Aviation University.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20050919/MPCPages.arcLast Updated: 2005-09-26

[ show close-approach data ]
Alternate Designations
 1982 UD6 = 1992 SQ15 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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