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12172 Niekdekort (2390 T-3)
Classification: Main-belt Asteroid          SPK-ID: 2012172
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 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07168697382642336 6.1612e-08  
a 2.386346742266787 1.8521e-08 AU
q 2.215276765813137 1.4847e-07 AU
i 7.60361080301022 7.7212e-06 deg
node 14.39417961290173 4.6067e-05 deg
peri 225.2982135486245 7.0354e-05 deg
M 162.733797729666 5.3323e-05 deg
tp 2456391.841056478554
(2013-Apr-09.34105648)
0.00019852 JED
period 1346.476409477758
3.69
1.5675e-05
4.292e-08
d
yr
n .2673645059549384 3.1126e-09 deg/d
Q 2.557416718720437 1.9849e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      980  
   data-arc span      15518 days (42.49 yr)  
   first obs. used      1972-04-09  
   last obs. used      2014-10-04  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .47608  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Oct-09 14:22:14  

Additional Information
 Earth MOID = 1.21291 AU 
 T_jup = 3.520 
[ 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 13.4 mag n/a MPO256954  

12172 Niekdekort           Discovered 1977 Oct. 16 by C. J. van Houten and I. van Houten-Groeneveld on Palomar Schmidt plates taken by T. Gehrels.
Niek De Kort (b. 1956) has done outstanding work popularizing astronomy. He authored several books, including one about space research and the course book Modern Astronomy (1980) for a TV course with an enrollment of 25~000 people. The name was suggested by H. van Woerden and A. v. d. Brugge.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20100527/MPCPages.arcLast Updated: 2010-12-06

Alternate Designations
 2390 T-3 = 1972 GC2 = 1981 UF9 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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