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

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Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 99 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4570618723643626 9.9223e-08  
a 10.70308302893785 1.8228e-06 au
q 5.811111859660281 2.6088e-07 au
i 4.342996498311638 3.8755e-06 deg
node 173.2641280894155 4.6806e-05 deg
peri 162.9120740877244 4.7492e-05 deg
M 52.49095303046709 1.2775e-05 deg
tp 2457135.650769274671
(2015-Apr-23.15076927)
0.00013423 TDB
period 12789.74155168134
35.02
0.0032673
8.945e-06
d
yr
n .02814755861526181 7.1906e-09 deg/d
Q 15.59505419821542 2.6559e-06 au
  Orbit Determination Parameters
   # obs. used (total)      4259  
   data-arc span      15026 days (41.14 yr)  
   first obs. used      1979-09-23  
   last obs. used      2020-11-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .52448  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Dec-17 21:43:05  

Additional Information
 Earth MOID = 4.80207 au 
 Jupiter MOID = .839157 au 
 T_jup = 3.030 
[ show covariance matrix ]

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

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 9.5   n/a MPO436206  
diameter diameter 59.000 km 4.000 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  
rotation period rot_per 26.802 h n/a LCDB (Rev. 2020-October); 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.]
geometric albedo albedo 0.077   0.015 urn:nasa:pds:neowise_diameters_albedos::2.0[centaurs] (http://adsabs.harvard.edu/abs/2013ApJ...773...22B)  

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 | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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