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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 2456800.5 (2014-May-23.0) TDB
Reference: JPL 57 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .455768674574797 2.8386e-07  
a 10.68798613398934 1.6896e-06 AU
q 5.816736859827211 3.2688e-06 AU
i 4.342729268923494 1.1402e-05 deg
node 173.3442746759081 0.00016575 deg
peri 162.9639757029176 0.00016921 deg
M 350.551284169908 1.6204e-05 deg
tp 2457135.475108487143
(2015-Apr-22.97510849)
0.00056864 JED
period 12762.69084856128
34.94
0.0030264
8.286e-06
d
yr
n .02820721776243465 6.6887e-09 deg/d
Q 15.55923540815148 2.4597e-06 AU
  Orbit Determination Parameters
   # obs. used (total)      445  
   data-arc span      12611 days (34.53 yr)  
   first obs. used      1979-09-23  
   last obs. used      2014-04-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .69082  
   data source      ORB  
   producer      Otto Matic  
   solution date      2014-Apr-17 15:07:35  

Additional Information
 Earth MOID = 4.80647 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 9.5 mag n/a MPO270421  
rotation period rot_per 26.802 h n/a Asteroid Lightcurve DataBase (Rev. 2013-Sep-12) 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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