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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 2457400.5 (2016-Jan-13.0) TDB
Reference: JPL 74 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4553711751978852 1.1053e-07  
a 10.68031990487895 2.2266e-06 au
q 5.816810078304857 8.6132e-07 au
i 4.344464011368522 7.2461e-06 deg
node 173.3352404590871 6.2084e-05 deg
peri 162.8888003253453 6.6113e-05 deg
M 7.511021169621227 6.2036e-06 deg
tp 2457134.506328576296
(2015-Apr-22.00632858)
0.00026637 JED
period 12748.96176565593
34.90
0.0039867
1.091e-05
d
yr
n .02823759350897059 8.8302e-09 deg/d
Q 15.54382973145305 3.2405e-06 au
  Orbit Determination Parameters
   # obs. used (total)      1370  
   data-arc span      13238 days (36.24 yr)  
   first obs. used      1979-09-23  
   last obs. used      2015-12-21  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .60743  
   data source      ORB  
   producer      Otto Matic  
   solution date      2016-Jan-04 15:27:56  

Additional Information
 Earth MOID = 4.80578 au 
 Jupiter MOID = .838867 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 LCDB (Rev. 2015-December); Warner et al., 2009 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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