65489 Ceto

65489 Ceto
Hubble Space Telescope image of Ceto and Phorcys, taken in 2006
Discovery
Discovered byC. A. Trujillo and M. Brown
Discovery sitePalomar
Discovery date22 March 2003
Designations
(65489) Ceto
Pronunciation/ˈst/
Named after
Ceto
2003 FX128
TNO
Centaur–extended[1]
AdjectivesCetoan /sˈtən/ or Cetoian /sˈt.iən/
Orbital characteristics[2]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 2
Observation arc9239 days (25.30 yr)
Aphelion187.74 AU (28.086 Tm)
Perihelion17.8498 AU (2.67029 Tm)
102.79 AU (15.377 Tm)
Eccentricity0.82635
1042.22 yr (380669.7 d)
9.1219°
0.00094570°/day
Inclination22.266°
171.85°
320.086°
Known satellitesPhorcys /ˈfɔːrsɪs/
(171±10[3] ~ 132+6
−14
 km
[4] in diameter)
Earth MOID16.895 AU (2.5275 Tm)
Jupiter MOID12.7433 AU (1.90637 Tm)
Physical characteristics
Dimensions223±10 km[3]
174+16
−18
 km
[4]
Mass(5.4±0.4)×1018 kg (system)[4]
Mean density
1.37 g/cm3 (system)[4]
Equatorial surface gravity
3.3 cm/s2[4]
4.43 h (0.185 d)
0.056±0.006[3]
0.084±0.02[4]
6.54±0.06,[3] 6.4[2]

65489 Ceto, as a binary also (65489) Ceto/Phorcys,[4] is a binary trans-Neptunian object (TNO) discovered on March 22, 2003, by Chad A. Trujillo and Michael Brown at Palomar. It is named after the sea goddess Ceto from Greek mythology. It came to perihelion in 1989.[2]

  1. ^ Marc W. Buie (2006-05-05). "Orbit Fit and Astrometric record for 65489". SwRI (Space Science Department). Retrieved 2009-01-25.
  2. ^ a b c "JPL Small-Body Database Browser: 65489 Ceto (2003 FX128)" (2006-05-05 last obs). Retrieved 25 March 2016.
  3. ^ a b c d Santos-Sanz, P., Lellouch, E., Fornasier, S., Kiss, C., Pal, A., Müller, T. G., Vilenius, E., Stansberry, J., Mommert, M., Delsanti, A., Mueller, M., Peixinho, N., Henry, F., Ortiz, J. L., Thirouin, A., Protopapa, S., Duffard, R., Szalai, N., Lim, T., Ejeta, C., Hartogh, P., Harris, A. W., & Rengel, M. (2012). “TNOs are Cool”: A Survey of the Transneptunian Region IV - Size/albedo characterization of 15 scattered disk and detached objects observed with Herschel Space Observatory-PACS
  4. ^ a b c d e f g Grundy, W.M.; Stansberry, J.A.; Noll K.S.; Stephens, D.C.; et al. (2007). "The orbit, mass, size, albedo, and density of (65489) Ceto/Phorcys: A tidally-evolved binary Centaur". Icarus. 191 (1): 286–297. arXiv:0704.1523. Bibcode:2007Icar..191..286G. doi:10.1016/j.icarus.2007.04.004. S2CID 1532765.