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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 68 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4555723276208703 1.5919e-07  
a 10.68463093173745 2.3415e-06 AU
q 5.817008748395871 1.8325e-06 AU
i 4.343382629224728 7.5845e-06 deg
node 173.3383260454431 9.1896e-05 deg
peri 162.9471836024777 9.6801e-05 deg
M 356.1978585183553 8.7626e-06 deg
tp 2457135.229744917379
(2015-Apr-22.72974492)
0.00027833 JED
period 12756.68157126964
34.93
0.0041933
1.148e-05
d
yr
n .02822050530843268 9.2765e-09 deg/d
Q 15.55225311507903 3.4082e-06 AU
  Orbit Determination Parameters
   # obs. used (total)      893  
   data-arc span      13020 days (35.65 yr)  
   first obs. used      1979-09-23  
   last obs. used      2015-05-17  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-BIG16  
   condition code      0  
   fit RMS      .58564  
   data source      ORB  
   producer      Otto Matic  
   solution date      2015-Jun-04 18:11:48  

Additional Information
 Earth MOID = 4.8085 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-May); 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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