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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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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 29 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1442542151603813 3.2267e-08  
a 2.206636059439547 6.0252e-09 au
q 1.888319506540499 7.287e-08 au
i 2.69390515739483 3.3944e-06 deg
node 183.9978296006413 6.517e-05 deg
peri 11.69945169075153 6.6014e-05 deg
M 291.9571042395953 1.0722e-05 deg
tp 2459426.794907291156
(2021-Jul-31.29490729)
3.5858e-05 TDB
period 1197.276596100173
3.28
4.9038e-06
1.343e-08
d
yr
n .3006823996832557 1.2315e-09 deg/d
Q 2.524952612338595 6.8944e-09 au
  Orbit Determination Parameters
   # obs. used (total)      1496  
   data-arc span      22063 days (60.41 yr)  
   first obs. used      1960-10-17  
   last obs. used      2021-03-14  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .48322  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Apr-13 03:22:00  

Additional Information
 Earth MOID = .886376 au 
 Jupiter MOID = 2.42934 au 
 T_jup = 3.645 
[ show covariance matrix ]

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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