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20476 Chanarich (1999 NH12)
Classification: Main-belt Asteroid          SPK-ID: 2020476
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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For accurate long-term ephemerides, please instead use our Horizons system.This orbit viewer was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances.


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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 23 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1443689305951221 3.9654e-08  
a 2.206326772127849 6.8486e-09 au
q 1.887801735492364 8.7405e-08 au
i 2.694009400768314 4.2934e-06 deg
node 184.0052245920651 7.1014e-05 deg
peri 11.74010903844368 7.1857e-05 deg
M 231.7745946411145 1.1298e-05 deg
tp 2459426.858336490547
(2021-Jul-31.35833649)
3.8158e-05 TDB
period 1197.024885255789
3.28
5.5735e-06
1.526e-08
d
yr
n .3007456272916771 1.4003e-09 deg/d
Q 2.524851808763335 7.8373e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1207  
   data-arc span      21560 days (59.03 yr)  
   first obs. used      1960-10-17  
   last obs. used      2019-10-28  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .51373  
   source      ORB  
   producer      Otto Matic  
   solution date      2019-Nov-07 04:23:27  

Additional Information
 Earth MOID = .886565 au 
 Jupiter MOID = 2.43055 au 
 T_jup = 3.646 
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Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.4   n/a MPO344464  

20476 Chanarich           Discovered 1999 July 13 by the Lincoln Laboratory Near-Earth Asteroid Research Team at Socorro.
Chana Leora Rich (b. 1990) is a finalist in the 2004 Discovery Channel Young Scientist Challenge (DCYSC), a middle school science competition, for her environmental sciences project. She attends the Hillel Academy, Fairfield, Connecticut.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20041028/MPCPages.arcLast Updated: 2004-10-29

[ show close-approach data ]
Alternate Designations
 1999 NH12 = 1997 YF21 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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