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60558 Echeclus (2000 EC98)
Classification: Centaur          SPK-ID: 2060558
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2457000.5 (2014-Dec-09.0) TDB
Reference: JPL 66 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4555722987521478 1.655e-07  
a 10.68463109459184 2.3576e-06 AU
q 5.817009145509958 1.9388e-06 AU
i 4.343382910603792 7.5891e-06 deg
node 173.3383314671737 9.2993e-05 deg
peri 162.947174036946 9.8097e-05 deg
M 356.1978587572401 8.7947e-06 deg
tp 2457135.229739532756
(2015-Apr-22.72973953)
0.00027918 JED
period 12756.68186292429
34.93
0.0042221
1.156e-05
d
yr
n .02822050466323027 9.3402e-09 deg/d
Q 15.55225304367372 3.4316e-06 AU
  Orbit Determination Parameters
   # obs. used (total)      870  
   data-arc span      12855 days (35.20 yr)  
   first obs. used      1979-09-23  
   last obs. used      2014-12-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .57827  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jan-08 04:51:21  

Additional Information
 Earth MOID = 4.80851 AU 
 T_jup = 3.031 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.6 mag n/a MPO309608  
rotation period rot_per 26.802 h n/a Asteroid Lightcurve DataBase (Rev. 2014-Mar-01) Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Rousselot, P.; Petit, J.-M.; Poulet, F.; Sergeev, A. (2005) Icarus 176, 478-491.]

60558 Echeclus           Discovered 2000 Mar. 3 by Spacewatch at Kitt Peak.
The centaur Echeclus was killed by Ampyx in the battle with the Lapiths.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20060219/MPCPages.arcLast Updated: 2010-06-03

[ show close-approach data ]
Alternate Designations
 2000 EC98 = 174P = 2002 GJ27 
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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