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129564 Christy (1997 ER40)
Classification: Main-belt Asteroid          SPK-ID: 2129564
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 16 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .08067797525458338 3.4894e-08  
a 2.674760680004248 1.4263e-08 au
q 2.458966404050932 8.8369e-08 au
i 14.34235316291043 5.0161e-06 deg
node 181.2331663242125 1.3836e-05 deg
peri 79.3923670058316 4.408e-05 deg
M 88.33806068628334 3.8256e-05 deg
tp 2458808.423166241568
(2019-Nov-20.92316624)
0.00017047 TDB
period 1597.812529010523
4.37
1.2781e-05
3.499e-08
d
yr
n .2253080342428764 1.8022e-09 deg/d
Q 2.890554955957564 1.5414e-08 au
  Orbit Determination Parameters
   # obs. used (total)      570  
   data-arc span      8649 days (23.68 yr)  
   first obs. used      1997-03-07  
   last obs. used      2020-11-10  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53599  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-18 04:45:19  

Additional Information
 Earth MOID = 1.49244 au 
 Jupiter MOID = 2.19217 au 
 T_jup = 3.330 
[ 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 15.90   n/a E2021B55  

129564 Christy           Discovered 1997 Mar. 7 by M. W. Buie at the Anderson Mesa Station of the Lowell Observatory.
James Walter Christy (b. 1938), for many years on the staff of the U.S. Naval Observatory, is the discoverer of Charon, the largest satellite of (134340) Pluto. Just thirty years ago Jim spotted that which many others failed to notice and unlocked many doors in the study of the Pluto system.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20080819/MPCPages.arcLast Updated: 2008-08-25
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances ]
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