14 Andromedae
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Andromeda |
| Right ascension | 23h 31m 17.41s[1] |
| Declination | +39° 14′ 10.3″[1] |
| Apparent magnitude (V) | 5.22 |
| Characteristics | |
| Spectral type | K0 III[2] |
| U−B color index | 0.87 |
| B−V color index | 1.02 |
| Variable type | Suspected |
| Astrometry | |
| Radial velocity (Rv) | -58.8 km/s |
| Proper motion (μ) | RA: 286.72 ± 0.23[1] mas/yr Dec.: -84.22 ± 0.17[1] mas/yr |
| Parallax (π) | 12.63 ± 0.27[1] mas |
| Distance | 258 ± 6 ly (79 ± 2 pc) |
| Absolute magnitude (MV) | 6.24 |
| Details | |
| Mass | 2.2[2] M☉ |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
14 Andromedae or 14 And is an orange giant star approximately 258 light-years away[1] in the constellation of Andromeda. The star is a suspected variable star. It is thought that 14 Andromedae was formerly an A- or F-type main-sequence star early in its life. As of 2008, an extrasolar planet is thought to be orbiting the star, being one of the few known planets to be orbiting an evolved intermediate-mass star.[2]
Planetary system
In 2008, a planet (designated 14 Andromedae b) was announced to be orbiting the star. The planet was found to have a minimum mass of 4.8 Jupiter masses and orbiting in a circular orbit that takes 186 days to complete. The planet is one of the innermost planets around an evolved intermediate-mass star (such planets have only been discovered in clump giants).[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 5.33 ± 0.57 MJ | 0.83 | 185.84 ± 0.23 | 0 | — | — |
See also
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 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
- ↑ 2.0 2.1 2.2 2.3 Sato, Bun'ei et al. (2008). "Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042". Publications of the Astronomical Society of Japan 60 (6): 1317–1326. arXiv:0807.0268. Bibcode:2008PASJ...60.1317S. doi:10.1093/pasj/60.6.1317.
- ↑ Ligi, R. et al. (2012). "A new interferometric study of four exoplanet host stars : θ Cygni, 14 Andromedae, υ Andromedae and 42 Draconis". Astronomy and Astrophysics 545. A5. arXiv:1208.3895. Bibcode:2012A&A...545A...5L. doi:10.1051/0004-6361/201219467.
External links
- Jean Schneider (2011). "Notes for star 14 And". Extrasolar Planets Encyclopaedia. Retrieved 30 September 2011.
Coordinates: 
23h 31m 17.4139s, +39° 14′ 10.313″
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