79 Ceti
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| Observation data Epoch J2000.0 Equinox J2000.0 |
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|---|---|
| Constellation | Cetus |
| Right ascension | 02h 35m 19.93s [1] |
| Declination | -03° 33′ 38.2″ [1] |
| Apparent magnitude (V) | +6.78 |
| Characteristics | |
| Spectral type | G5IV |
| Variable type | none |
| Astrometry | |
| Radial velocity (Rv) | -53 km/s |
| Proper motion (μ) | RA: -157.31 ± 0.49 [1] mas/yr Dec.: -438.79 ± 0.43 [1] mas/yr |
| Parallax (π) | 25.67 ± 0.66[1] mas |
| Distance | 127 ± 3 ly (39 ± 1 pc) |
| Absolute magnitude (MV) | 4.00 |
| Details | |
| Mass | 1.14[2] M☉ |
| Radius | 1.57 R☉ |
| Luminosity | 2.16 L☉ |
| Temperature | 5,806[2] K |
| Metallicity | [Fe/H] = 0.16[2] 1.45 × Solar |
| Age | 6.0[2] Gyr |
| Other designations | |
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HD 16141, GJ 9085, HIP 12048
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79 Ceti (also known as HD 16141) is a yellow subgiant star approximately 127 light-years[1] away in the constellation Cetus. It has stopped hydrogen fusion in its core, this implies an age much higher than our Sun's 4.5 billion years. Eventually the outer layers of the star will expand and cool and the star will become a red giant. Currently 79 Ceti has a luminosity twice that of the Sun.
Contents |
[edit] Planetary system
As of 2000, an extrasolar planet, designated 79 Ceti b, is known to orbit 79 Ceti.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity |
|---|---|---|---|---|
| b | ≥0.260 ± 0.028 MJ | 0.363 ± 0.021 | 75.523 ± 0.055 | 0.252 ± 0.052 |
[edit] See also
[edit] References
- ^ a b c d e f van Leeuwen, F. (2007). "HIP 12048". Hipparcos, the New Reduction. http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=12017. Retrieved 2010-01-05.
- ^ a b c d Sousa, S. G.; Fernandes, J.; Israelian, G.; Santos, N. C. (March 2010). "Higher depletion of lithium in planet host stars: no age and mass effect". Astronomy and Astrophysics 512: L5. Bibcode 2010A&A...512L...5S. doi:10.1051/0004-6361/201014125.
- ^ Marcy et al (2000). "Sub-Saturn Planetary Candidates of HD 16141 and HD 46375". The Astrophysical Journal 536 (1): L43–L46. arXiv:astro-ph/0004326. Bibcode 2000ApJ...536L..43M. doi:10.1086/312723. http://www.iop.org/EJ/article/1538-4357/536/1/L43/005174.html.
- ^ Butler et al (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode 2006ApJ...646..505B. doi:10.1086/504701. http://www.iop.org/EJ/article/0004-637X/646/1/505/64046.html.
[edit] External links
- SIMBAD: HD 16141 -- High proper-motion Star
- SolStation: 79 Ceti
- Extrasolar Planets Encyclopaedia: HD 16141
- Extrasolar Visions: 79 Ceti
Coordinates: 
02h 35m 19.9283s, −03° 33′ 38.167″
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