94 Ceti (HD 19994) is a
trinary star system approximately 73
light-year
A light-year, alternatively spelled light year, is a large unit of length used to express astronomical distances and is equivalent to about 9.46 trillion kilometers (), or 5.88 trillion miles ().One trillion here is taken to be 1012 ...
s away in the
constellation
A constellation is an area on the celestial sphere in which a group of visible stars forms Asterism (astronomy), a perceived pattern or outline, typically representing an animal, mythological subject, or inanimate object.
The origins of the e ...
Cetus.
94 Ceti A is a
yellow-white dwarf
An F-type main-sequence star (F V) is a main-sequence, hydrogen-fusing star of spectral type F and luminosity class V. These stars have from 1.0 to 1.4 times the mass of the Sun and surface temperatures between 6,000 and 7,600 K.Tables VI ...
star
A star is an astronomical object comprising a luminous spheroid of plasma (physics), plasma held together by its gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked ...
with about 1.3 times the mass of the
Sun while 94 Ceti B and C are
red dwarf
''Red Dwarf'' is a British science fiction comedy franchise created by Rob Grant and Doug Naylor, which primarily consists of a television sitcom that aired on BBC Two between 1988 and 1999, and on Dave since 2009, gaining a cult following. T ...
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 The Geneva Extrasolar Planet Search is a variety of observational programs run by the Geneva Observatory at Versoix, a small town near Geneva, Switzerland. The programs are executed by M. Mayor, D. Naef, F. Pepe, D. Queloz, N.C. Santos, and S. U ...
team as a result of radial velocity
The radial velocity or line-of-sight velocity, also known as radial speed or range rate, of a target with respect to an observer is the temporal rate of change, rate of change of the distance or Slant range, range between the two points. It is e ...
measurements taken with the Swiss 1.2-metre Leonhard Euler Telescope at La Silla Observatory in Chile.
See also
* 79 Ceti
79 Ceti, also known as ''HD 16141'', is a binary star system located 123 light-years from the Sun in the southern constellation of Cetus. It has an apparent visual magnitude of +6.83, which puts it below the normal limit for vi ...
* 81 Ceti
* Lists of exoplanets
These are lists of exoplanets. Most of these were discovered by the Kepler space telescope. There are an additional 2,054 potential exoplanets from Kepler's first mission yet to be confirmed, as well as 978 from its "Second Light" mission and 4 ...
References
External links
SolStation: 94 Ceti 2
by Professor Jim Kaler.
{{DEFAULTSORT:94 Ceti
Cetus (constellation)
F-type main-sequence stars
M-type main-sequence stars
Binary stars
Ceti, 94
019994
014954
0962
Durchmusterung objects
0128
Planetary systems with one confirmed planet