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JPL Small-Body Database Browser
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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 ]

[ show orbit diagram ]
Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 95 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .457061930635543 1.1075e-07  
a 10.70308355823986 1.9388e-06 au
q 5.811111523357213 3.4893e-07 au
i 4.342983032152651 4.751e-06 deg
node 173.2642034724138 5.4113e-05 deg
peri 162.9119891063416 5.5084e-05 deg
M 52.4909520377014 1.3195e-05 deg
tp 2457135.650666210496
(2015-Apr-23.15066621)
0.00016208 TDB
period 12789.74250042237
35.02
0.0034751
9.514e-06
d
yr
n .02814755652728047 7.648e-09 deg/d
Q 15.59505559312251 2.8249e-06 au
  Orbit Determination Parameters
   # obs. used (total)      3999  
   data-arc span      14712 days (40.28 yr)  
   first obs. used      1979-09-23  
   last obs. used      2020-01-03  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .53057  
   source      ORB  
   producer      Otto Matic  
   solution date      2020-Jan-29 09:58:18  

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. 2019-August); 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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