+ View the NASA Portal + Center for Near-Earth Object Studies 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 2459200.5 (2020-Dec-17.0) TDB Reference: JPL 10 (heliocentric ecliptic J2000)  Element Value Uncertainty (1-sigma)   Units  e .8215480808788446 8.0552e-06   a 100.1859133472414 0.0050082 au q 17.87836850572101 9.54e-05 au i 22.31808763211643 2.5306e-05 deg node 172.1140707202735 9.614e-05 deg peri 319.7262327064192 0.0005196 deg M 11.28942194813912 0.00087005 deg tp 2447714.266937606499 (1989-Jul-06.76693761) 0.024774 TDB period 366275.9635929151 1002.81 27.465 0.0752 d yr n .0009828654778999085 7.3699e-08 deg/d Q 182.4934581887618 0.0091226 au   Orbit Determination Parameters    # obs. used (total)      278      data-arc span      12155 days (33.28 yr)      first obs. used      1987-01-31      last obs. used      2020-05-12      planetary ephem.      DE431      SB-pert. ephem.      SB431-N16      condition code      1      norm. resid. RMS      .55514      source      ORB      producer      Otto Matic      solution date      2020-Nov-12 22:22:01   Additional Information  Earth MOID = 16.924 au   Jupiter MOID = 12.7648 au   T_jup = 4.681  [ 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 6.45   n/a E2021B10   rotation period rot_per 4.43 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: [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.arc Last Updated: 2006-11-13 [ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Discovery Circumstances ] 2021-Mar-03 03:35 UT (server date/time)   Site Manager:   Ryan S. Park Webmaster:   Alan B. Chamberlin