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20197 Enriques (1997 CK22)
Classification: Main-belt Asteroid          SPK-ID: 2020197
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 10 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1156406269715042 6.8379e-08  
a 2.694436737438199 2.467e-08 AU
q 2.382850383785792 1.9562e-07 AU
i 13.69503479570769 6.8879e-06 deg
node 148.1312777807522 3.3842e-05 deg
peri 335.4071130627744 4.9834e-05 deg
M 29.36022522687752 3.7102e-05 deg
tp 2456868.747975953007
(2014-Jul-30.24797595)
0.00016601 JED
period 1615.475640612503
4.42
2.2187e-05
6.074e-08
d
yr
n .2228445857985869 3.0605e-09 deg/d
Q 3.006023091090606 2.7523e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      659  
   data-arc span      6778 days (18.56 yr)  
   first obs. used      1995-09-03  
   last obs. used      2014-03-25  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .49811  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Jun-09 22:38:42  

Additional Information
 Earth MOID = 1.40396 AU 
 T_jup = 3.320 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.9 mag n/a MPO250412  

20197 Enriques           Discovered 1997 Feb. 14 by P. G. Comba at Prescott.
Federigo Enriques (1871-1946), professor at the universities of Bologna and Rome, made major contributions to the theory of algebraic surfaces and wrote widely on the history and philosophy of science. He received numerous awards, including an honorary doctorate from the University of St. Andrews.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20010509/MPCPages.arcLast Updated: 2009-05-11
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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