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129564 Christy (1997 ER40)
Classification: Main-belt Asteroid          SPK-ID: 2129564
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

[ show orbit diagram ]
Orbital Elements at Epoch 2456800.5 (2014-May-23.0) TDB
Reference: JPL 4 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .07931503084439273 7.9828e-08  
a 2.675549479959367 3.5841e-08 AU
q 2.463338190430691 2.179e-07 AU
i 14.336894830794 1.4775e-05 deg
node 181.3266120656008 3.3028e-05 deg
peri 79.86279633043311 0.00010365 deg
M 267.3171499352941 0.0001023 deg
tp 2457212.042590280239
(2015-Jul-08.54259028)
0.00045677 JED
period 1598.519385166213
4.38
3.212e-05
8.794e-08
d
yr
n .2252084043150765 4.5253e-09 deg/d
Q 2.887760769488042 3.8684e-08 AU
  Orbit Determination Parameters
   # obs. used (total)      213  
   data-arc span      6174 days (16.90 yr)  
   first obs. used      1997-03-07  
   last obs. used      2014-01-31  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58012  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Feb-19 20:20:00  

Additional Information
 Earth MOID = 1.49825 AU 
 T_jup = 3.330 
[ 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 15.8 mag n/a MPO241041  

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 | Physical Parameters | Discovery Circumstances ]
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