94 Ceti
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Cetus |
| Right ascension | 03h 12m 46.44s[1] |
| Declination | −01° 11′ 46.0″[1] |
| Apparent magnitude (V) | +5.07 |
| Characteristics | |
| Spectral type | F8V / M3V |
| U−B color index | 0.11 / ? |
| B−V color index | 0.56 / ? |
| Variable type | None |
| Astrometry | |
| Radial velocity (Rv) | +18.3 km/s |
| Proper motion (μ) | RA: 194.56 ± 0.37[1] mas/yr Dec.: -69.01 ± 0.30[1] mas/yr |
| Parallax (π) | 44.29 ± 0.28[1] mas |
| Distance | 73.6 ± 0.5 ly (22.6 ± 0.1 pc) |
| Absolute magnitude (MV) | 3.32 |
| Orbit | |
| Companion | 94 Ceti B |
| Period (P) | 1,470 yr |
| Semi-major axis (a) | 151 AU" |
| Eccentricity (e) | 0.26 |
| Inclination (i) | 114.10° |
| Details | |
| Mass | 1.30[2] M☉ |
| Radius | 1.898 ± 0.070[3] R☉ |
| Luminosity | 4.02 ± 0.05[4] L☉ |
| Surface gravity (log g) | 3.98 ± 0.10[2] cgs |
| Temperature | 6,055 ± 10.0[5] K |
| Metallicity [Fe/H] | 1.15 ± 0.07[2] dex |
| Rotational velocity (v sin i) | 8.4 ± 0.8[2] km/s |
| Age | 4.8[4] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Extrasolar Planets Encyclopaedia | data |
94 Ceti (HD 19994) is a binary 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 is a red dwarf star. According to the new Sixth Catalog of Orbits of Visual Binaries, stars A and B have an average separation of 151 AU.
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.[6]
Planetary system
On 7 August 2000, a planet was discovered.[7] It is most stable if its inclination is either 65 or 115, ± 3.[8]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 1.855 ± 0.045 MJ | 1.427 | 535.7 ± 3.1 | 0.30 ± 0.04 | — | — |
See also
References
- 1 2 3 4 5 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry - 1 2 3 4 Fuhrmann, K. (2008). "Nearby stars of the Galactic disc and halo - IV". Monthly Notices of the Royal Astronomical Society. 384 (1): 173–224. Bibcode:2008MNRAS.384..173F. doi:10.1111/j.1365-2966.2007.12671.x.
- ↑ van Belle, G. T.; von Brau, K. (2009). "Directly Determined Linear Radii and Effective Temperatures of Exoplanet Host Stars". The Astrophysical Journal. 694 (2): 1085–1098. arXiv:0901.1206. Bibcode:2009ApJ...694.1085V. doi:10.1088/0004-637X/694/2/1085.
- 1 2 Boyajian, Tabetha S.; et al. (July 2013), "Stellar Diameters and Temperatures. III. Main-sequence A, F, G, and K Stars: Additional High-precision Measurements and Empirical Relations", The Astrophysical Journal, 771 (1): 31, arXiv:1306.2974, Bibcode:2013ApJ...771...40B, doi:10.1088/0004-637X/771/1/40, 40. See Table 3.
- ↑ Kovtyukh, V. V.; Soubiran, C.; Belik, S. I.; Gorlova, N. I. (2003). "High precision effective temperatures for 181 F-K dwarfs from line-depth ratios". Astronomy and Astrophysics. 411 (3): 559–564. arXiv:astro-ph/0308429. Bibcode:2003A&A...411..559K. doi:10.1051/0004-6361:20031378.
- ↑ Eiroa, C.; et al. (July 2013). "DUst around NEarby Stars. The survey observational results". Astronomy & Astrophysics. 555: A11. arXiv:1305.0155. Bibcode:2013A&A...555A..11E. doi:10.1051/0004-6361/201321050.
- ↑ "European Southern Observatory: Six Extrasolar Planets Discovered". SpaceRef.com. 7 August 2000. Retrieved 2009-08-02.
- 1 2 Plávalová, Eva; Solovaya, Nina A. (1 November 2013). "ANALYSIS OF THE MOTION OF AN EXTRASOLAR PLANET IN A BINARY SYSTEM". The Astronomical Journal. 146 (5): 108. doi:10.1088/0004-6256/146/5/108.
External links
- SolStation: 94 Ceti 2 + orbits
- 94 Ceti by Professor Jim Kaler.
Coordinates: 
03h 12m 46.4365s, −01° 11′ 45.964″
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