94 Ceti
Template:Short description Template:Use dmy dates
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | +5.070[2] |
| Characteristics | |
| Spectral type | F8V / M3V / M |
| U−B Template:Engvar | +0.09[3] |
| B−V Template:Engvar | +0.56[3] |
| Astrometry | |
| Radial velocity (Rv) | +18.96 ± 0.08[4] km/s |
| Proper motion (μ) | RA: 194.56[1] mas/yr Dec.: −69.01[1] mas/yr |
| Parallax (π) | 44.29±0.28 mas[1] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 3.32 |
| Orbit[5] | |
| Primary | 94 Ceti A |
| Companion | 94 Ceti BC |
| Period (P) | Script error: No such module "val". yr |
| Semi-major axis (a) | Script error: No such module "val". AU |
| Eccentricity (e) | Script error: No such module "val". |
| Inclination (i) | Script error: No such module "val".° |
| Longitude of the node (Ω) | Script error: No such module "val".° |
| Argument of periastron (ω) (secondary) | Script error: No such module "val".° |
| Orbit[6] | |
| Primary | 94 Ceti B |
| Companion | 94 Ceti C |
| Period (P) | Script error: No such module "val". |
| Semi-major axis (a) | Script error: No such module "val". AU |
| Eccentricity (e) | Script error: No such module "val". |
| Inclination (i) | Script error: No such module "val".° |
| Longitude of the node (Ω) | Script error: No such module "val".° |
| Periastron epoch (T) | MJD Script error: No such module "val". |
| Argument of periastron (ω) (secondary) | Script error: No such module "val".° |
| Details | |
| Mass | 1.30[7] Template:Solar mass |
| Radius | 1.898 ± 0.070[8] Template:Solar radius |
| Luminosity | 4.02 ± 0.05[9] Template:Solar luminosity |
| Surface gravity (log g) | 3.98 ± 0.10[7] cgs |
| Temperature | 6,055 ± 10.0[10] K |
| Metallicity [Fe/H] | 1.15 ± 0.07[7] dex |
| Rotation | Script error: No such module "val".[11] |
| Rotational velocity (v sin i) | 8.4 ± 0.8[7] km/s |
| Age | 4.8[9] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| BD−01°457, FK5 116, GJ 128, HD 19994, HIP 14954, HR 962, LTT 1515, SAO 130355 | |
| Database references | |
| SIMBAD | data |
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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.[12]
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.[5]
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.[13] It is most stable if its inclination is either 65 or 115, ± 3.[14]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
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See also
References
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- ↑ a b c d e Script error: No such module "Citation/CS1". Vizier catalog entry
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External links
- SolStation: 94 Ceti 2 + orbits
- 94 Ceti by Professor Jim Kaler.