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65489 Ceto (2003 FX128)
Classification: TransNeptunian Object          SPK-ID: 2065489
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

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Orbit Diagram
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Note: This Java-based orbit viewer will eventually be retired.

Note: Make sure you have Java enabled on your browser to see the applet. This applet is provided as a 3D orbit visualization tool. The applet was implemented using two-body methods, and hence should not be used for determining accurate long-term trajectories (over several years or decades) or planetary encounter circumstances. For accurate long-term ephemerides, please instead use our Horizons system.

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Orbit Viewer

Additional Notes: the orbits shown in the applet are color coded. The planets are white lines, and the asteroid/comet is a blue line. The bright white line indicates the portion of the orbit that is above the ecliptic plane, and the darker portion is below the ecliptic plane. Likewise for the asteroid/comet orbit, the light blue indicates the portion above the ecliptic plane, and the dark blue the portion below the ecliptic plane.

Orbit Viewer applet originally written and kindly provided by Osamu Ajiki (AstroArts), and further modified by Ron Baalke (JPL).


Orbital Elements at Epoch 2459000.5 (2020-May-31.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .8221656814920131 1.7712e-05  
a 100.6696084057586 0.010759 au
q 17.90251120530399 0.00014049 au
i 22.3105154529261 4.1395e-05 deg
node 172.0735764855813 0.00014333 deg
peri 319.8720569628101 0.00088061 deg
M 11.00738173797868 0.0018117 deg
tp 2447720.021473736819
(1989-Jul-12.52147374)
0.048854 TDB
period 368931.7192882667
1010.08
59.142
0.1619
d
yr
n .0009757903188549426 1.5642e-07 deg/d
Q 183.4367056062131 0.019604 au
  Orbit Determination Parameters
   # obs. used (total)      190  
   data-arc span      10389 days (28.44 yr)  
   first obs. used      1987-01-31  
   last obs. used      2015-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .39376  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 17:15:01  

Additional Information
 Earth MOID = 16.948 au 
 Jupiter MOID = 12.7873 au 
 T_jup = 4.685 
[ hide covariance matrix ]
Orbital Elements at Epoch 2456463.5 (2013-Jun-20.0) TDB
Reference: JPL 9 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .824342911605961 1.7616e-05  
q 17.76271229059501 0.00014093 au
tp 2447738.571559061709
(1989-Jul-31.07155906)
0.048023 TDB
node 171.9548244497604 0.00014402 deg
peri 319.5967845648002 0.00088293 deg
i 22.2921457930276 4.1395e-05 deg
  Orbit Determination Parameters
   # obs. used (total)      190  
   data-arc span      10389 days (28.44 yr)  
   first obs. used      1987-01-31  
   last obs. used      2015-07-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      2  
   norm. resid. RMS      .39376  
   source      ORB  
   producer      Otto Matic  
   solution date      2017-Apr-11 17:15:01  

Additional Information
 Jupiter MOID = 12.7873 au 
 T_jup = 4.685 
Orbit Covariance (6×6)
  e q tp node peri i
e 3.103286146210219E-10 2.288362881477254E-9 8.375541112881532E-7 -2.4593112352178E-11 1.49941728024796E-8 4.965098461103966E-11
q 2.288362881477254E-9 1.986255519284228E-8 6.137284786025169E-6 -2.948862505336756E-10 1.209784173404276E-7 3.414156830895045E-10
tp 8.375541112881532E-7 6.137284786025169E-6 .002306228728510557 -5.816552941385358E-8 4.054809158074447E-5 1.342529708563667E-7
node -2.4593112352178E-11 -2.948862505336756E-10 -5.816552941385358E-8 2.074102724403108E-8 -2.073595944486564E-8 5.807294377992228E-9
peri 1.49941728024796E-8 1.209784173404276E-7 4.054809158074447E-5 -2.073595944486564E-8 7.795739737816447E-7 -3.063504007050742E-9
i 4.965098461103966E-11 3.414156830895045E-10 1.342529708563667E-7 5.807294377992228E-9 -3.063504007050742E-9 1.713532525766293E-9

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 6.4   n/a MPO231800  
rotation period rot_per 4.43 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:
[Dotto, E.; Pema, D.; Barucci, M.A.; Rossi, A. et al. (2008) Astron. Astrophys. 490, 829-833.]
[Perna, D.; Dotto, E.; Barucci, M.A.; Rossi, A.; et al. (2008) Bull. Amer. Astron. Soc. 40, #47.08.]

65489 Ceto           Discovered 2003 Mar. 22 by C. A. Trujillo and M. Brown at Palomar.
The satellite (65489) Ceto I, discovered 2006 Apr. 11 by K. Noll, H. Levison, W. Grundy and D. Stephens using the Hubble Space Telescope, is named Phorcys, for another child of Gaia and Pontus. Phorcys is represented with a man's head, crab's claws and a fish tail. Together the monstrous sea creatures Ceto and Phorcys produced numerous offspring, including many monstrous creatures known collectively as the Phorcydides.
NOTE: some special characters may not display properly (any characters within {} are an attempt to place the proper accent above a character)
Reference: 20061109/MPCPages.arcLast Updated: 2006-11-13
Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ]
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