title: 94 Ceti
text: # 94 Ceti
  
  94 Ceti (HD 19994) is a trinary star system approximately 73 light-years away in the constellation Cetus.
  
  94 Ceti A is a yellow-white dwarf star with about 1.3 times the mass of the Sun while 94 Ceti B and C are red dwarf stars.
  
  An infrared excess has been detected around the primary, most likely indicating the presence of a circumstellar disk at a radius of 95 AU. The temperature of this dust is 40 K.
  
  ## Stellar system
  
  This system is a hierarchical triple star system with 94 Ceti A being orbited by 94 Ceti BC, a pair of M dwarfs, in 2000 years. 94 Ceti B and C meanwhile orbit each other in a 1-year orbit.
  
  ## Planetary system
  
  On 7 August 2000, a planet was announced by the Geneva Extrasolar Planet Search team as a result of radial velocity measurements taken with the Swiss 1.2-metre Leonhard Euler Telescope at La Silla Observatory in Chile. It is most stable if its inclination is either 65 or 115, ± 3.
  
  The 94 Ceti planetary system :
  
  | Companion (in order from star) | Mass | Semimajor axis (AU) | Orbital period (days) | Eccentricity | Inclination | Radius |
  | - | - | - | - | - | - | - |
  | b | 1.855 ± 0.045 $M_J$ | 1.427 | 535.7 ± 3.1 | 0.30 ± 0.04 | — | — |
  