+ View the NASA Portal + Near-Earth Object (NEO) Program Search JPL JPL Small-Body Database Browser Search: [ help ]   65489 Ceto (2003 FX128) Classification: TransNeptunian Object          SPK-ID: 2065489 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] [ show orbit diagram ] Orbital Elements at Epoch 2456400.5 (2013-Apr-18.0) TDB Reference: JPL 4 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .8241099406798027 2.3508e-05   a 100.9694947893143 0.014255 AU q 17.75953042802284 0.00013749 AU i 22.2951993886359 5.3631e-05 deg node 171.9655656503795 0.00010222 deg peri 319.5652556204693 0.00094609 deg M 8.416265136167882 0.0018356 deg tp 2447736.855776577873 (1989-Jul-29.35577658) 0.055562 JED period 370581.4717063533 1014.60 78.479 0.2149 d yr n .0009714463012475216 2.0573e-07 deg/d Q 184.1794591506057 0.026003 AU   Orbit Determination Parameters    # obs. used (total)      80      data-arc span      9239 days (25.30 yr)      first obs. used      1987-01-31      last obs. used      2012-05-18      planetary ephem.      DE405      SB-pert. ephem.      SB405-CPV-2      condition code      2      fit RMS      .55943      data source      ORB      producer      Otto Matic      solution date      2012-Jun-06 14:27:57   Additional Information  Earth MOID = 16.8051 AU   T_jup = 4.669  [ show covariance matrix ] [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] Physical Parameter Table Parameter Symbol Value Units Sigma Reference Notes absolute magnitude H 6.2317 mag .50185 4 autocmod 2.5b rotation period rot_per 4.43 h n/a Asteroid Lightcurve DataBase (Rev. 2013-May-01) 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) Bul. Amer. Astron. Soc. 40, 483 (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.arc Last Updated: 2006-11-13 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2013-May-19 19:06 UT (server date/time)   Site Manager:   Donald K. Yeomans Webmaster:   Alan B. Chamberlin