HD 23079
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 03h 39m 43.096s[1] |
| Declination | −52° 54′ 57.02″[1] |
| Apparent magnitude (V) | 7.1 |
| Characteristics | |
| Spectral type | F8/G0V |
| Astrometry | |
| Proper motion (μ) | RA: -192.57 ± 0.37[1] mas/yr Dec.: -92.82 ± 0.42[1] mas/yr |
| Parallax (π) | 29.51 ± 0.34 mas[1] |
| Distance | 111 ± 1 ly (33.9 ± 0.4 pc) |
| Details | |
| Mass | 1.01 ± 0.02[2] M☉ |
| Radius | 1.08 ± 0.02[2] R☉ |
| Luminosity | 1.372 ± 0.005[2] L☉ |
| Surface gravity (log g) | 4.37 ± 0.04[2] cgs |
| Temperature | 6003 ± 36[2] K |
| Age | 5.1 ± 1.0[2] Gyr |
| Other designations | |
HD 23079 is a star approximately 114 light years away in the constellation Reticulum. Since the star is magnitude 7.1, it is not visible to the naked eye, but at least in binoculars, it should be easily visible. The spectral type is F8 or G0, it is a main-sequence (hydrogen-fusing) star. The star is larger and more massive than our Sun. As it is typical for planet-harboring stars, it is a population I star, with metallicity of –0.24 dex (58% solar). The age of the star is 6.53 billion years old, older than Sun’s 4.57 billion years.
Planetary system
In October 2001, a giant planet orbiting the star was announced.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >2.45 ± 0.21 MJ | 1.596 ± 0.093 | 730.6 ± 5.7 | 0.102 ± 0.031 | — | — |
References
- ^ a b c d e 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
- ^ a b c d e f Bonfanti, A.; et al. (2015). "Revising the ages of planet-hosting stars". Astronomy and Astrophysics. 575. A18. arXiv:1411.4302. Bibcode:2015A&A...575A..18B. doi:10.1051/0004-6361/201424951.
- ^ Tinney, C. G.; et al. (2002). "Two Extrasolar Planets from the Anglo-Australian Planet Search". The Astrophysical Journal. 571 (1): 528–531. arXiv:astro-ph/0111255. Bibcode:2002ApJ...571..528T. doi:10.1086/339916.
- ^ Butler, R. P.; 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.
External links
- "Notes for star HD 23079". The Extrasolar Planets Encyclopaedia.
- "NLTT 11572 – High proper-motion star". SIMBAD.
 | This main-sequence-star-related article is a stub. You can help Wikipedia by expanding it. |