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186917 (2004 NC21)
Classification: Main-belt Asteroid          SPK-ID: 2186917
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1162969380042535 6.7426e-08  
a 2.809755814532262 2.6202e-08 au
q 2.482989816762513 1.7632e-07 au
i 7.353539922555185 4.581e-06 deg
node 165.7357599331638 3.2379e-05 deg
peri 183.1639973841336 3.7628e-05 deg
M 139.0897878578515 2.351e-05 deg
tp 2458535.848424166194
(2019-Feb-21.34842417)
0.0001074 TDB
period 1720.288534372535
4.71
2.4063e-05
6.588e-08
d
yr
n .2092672204731678 2.9272e-09 deg/d
Q 3.136521812302012 2.9249e-08 au
  Orbit Determination Parameters
   # obs. used (total)      423  
   data-arc span      8399 days (23.00 yr)  
   first obs. used      1998-03-21  
   last obs. used      2021-03-19  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .56609  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-May-04 10:14:36  

Additional Information
 Earth MOID = 1.47474 au 
 Jupiter MOID = 2.28271 au 
 T_jup = 3.300 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.98   n/a MPCxxxxx  

186917 (2004 NC21)          Discovered 2004-Jul-14 by LINEAR at Socorro
Reference: 20080520/Numbers.arcLast Updated: 2008-05-22
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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