65489 Ceto
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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]
Quick Facts Discovery, Discovered by ...
Discovery | |
---|---|
Discovered by | C. A. Trujillo and M. Brown |
Discovery site | Palomar |
Discovery date | 22 March 2003 |
Designations | |
(65489) Ceto | |
Pronunciation | /ˈsiːtoʊ/ |
Named after | Ceto |
2003 FX128 | |
TNO Centaur–extended[1] | |
Adjectives | Cetoan /siːˈtoʊən/ or Cetoian /siːˈtoʊ.iən/ |
Orbital characteristics[2] | |
Epoch 13 January 2016 (JD 2457400.5) | |
Uncertainty parameter 2 | |
Observation arc | 9239 days (25.30 yr) |
Aphelion | 187.74 AU (28.086 Tm) |
Perihelion | 17.8498 AU (2.67029 Tm) |
102.79 AU (15.377 Tm) | |
Eccentricity | 0.82635 |
1042.22 yr (380669.7 d) | |
9.1219° | |
0.00094570°/day | |
Inclination | 22.266° |
171.85° | |
320.086° | |
Known satellites | Phorcys /ˈfɔːrsɪs/ (171±10[3] ~ 132+6 −14 km[4] in diameter) |
Earth MOID | 16.895 AU (2.5275 Tm) |
Jupiter MOID | 12.7433 AU (1.90637 Tm) |
Physical characteristics | |
Dimensions | 223±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] | |
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