Skip Page Navigation
NASA JPL Caltech
NASA Logo - Jet Propulsion Laboratory + View the NASA Portal
+ Center for Near-Earth Object Studies
JPL Home Earth Solar System Stars & Galaxies Technology
JPL Solar System Dynamics
BODIES ORBITS EPHEMERIDES TOOLS PHYSICAL DATA DISCOVERY FAQ SITE MAP

Significant website upgrade scheduled for September 27. More details available here.

JPL Small-Body Database Browser
Search: [ help ]  
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 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4574131714345304 9.8746e-08  
a 10.71927983201105 1.8167e-06 au
q 5.816140048556674 2.6065e-07 au
i 4.343254691197056 3.8529e-06 deg
node 173.2199639917056 4.6732e-05 deg
peri 163.0966986346139 4.74e-05 deg
M 63.43700930045458 1.5442e-05 deg
tp 2457137.651837043159
(2015-Apr-25.15183704)
0.00013297 TDB
period 12818.78429692359
35.10
0.0032588
8.922e-06
d
yr
n .02808378639200577 7.1395e-09 deg/d
Q 15.62241961546542 2.6477e-06 au
  Orbit Determination Parameters
   # obs. used (total)      4313  
   data-arc span      15135 days (41.44 yr)  
   first obs. used      1979-09-23  
   last obs. used      2021-03-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52309  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:33:25  

Additional Information
 Earth MOID = 4.80634 au 
 Jupiter MOID = .845081 au 
 T_jup = 3.031 
[ hide covariance matrix ]
Orbital Elements at Epoch 2457235.5 (2015-Aug-01.0) TDB
Reference: JPL 102 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .4554591809459738 9.8589e-08  
q 5.817030843865708 2.6041e-07 au
tp 2457134.813779932414
(2015-Apr-22.31377993)
0.00013359 TDB
node 173.335560414646 4.673e-05 deg
peri 162.9143722922798 4.7407e-05 deg
i 4.344010682677986 3.8558e-06 deg
  Orbit Determination Parameters
   # obs. used (total)      4313  
   data-arc span      15135 days (41.44 yr)  
   first obs. used      1979-09-23  
   last obs. used      2021-03-01  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .52309  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Aug-25 17:33:25  

Additional Information
 Jupiter MOID = .845081 au 
 T_jup = 3.031 
Orbit Covariance (6×6)
  e q tp node peri i
e 9.719745116961237E-15 -1.025380811104739E-14 -3.747865776076697E-12 -7.13615487616039E-15 -3.116303320256945E-13 1.501999897289219E-15
q -1.025380811104739E-14 6.78127756467042E-14 1.719953215613497E-12 1.532980981624848E-14 3.707637731019404E-13 1.690638228355943E-15
tp -3.747865776076697E-12 1.719953215613497E-12 1.78457675935565E-8 1.391245126444311E-11 1.107878632167999E-9 -1.053687959492643E-12
node -7.13615487616039E-15 1.532980981624848E-14 1.391245126444311E-11 2.183729698868624E-9 -2.176442395528566E-9 4.752262189390281E-11
peri -3.116303320256945E-13 3.707637731019404E-13 1.107878632167999E-9 -2.176442395528566E-9 2.247454269558698E-9 -4.745333896613776E-11
i 1.501999897289219E-15 1.690638228355943E-15 -1.053687959492643E-12 4.752262189390281E-11 -4.745333896613776E-11 1.486721631268672E-11

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 9.17   n/a E2021B10  
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 ]
ABOUT SSD CREDITS/AWARDS PRIVACY/COPYRIGHT GLOSSARY LINKS
FirstGov 2021-Sep-21 04:21 UT
(server date/time)  
NASA Home Page
Site Manager:   Ryan S. Park
Webmaster  Alan B. Chamberlin