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[1] mas |
| Distance | 111 ± 1 ly (33.9 ± 0.4 pc) |
| Details | |
| 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.[2]
| 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
- 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
- ↑ 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.
Coordinates: 
03h 39m 43.0952s, −52° 54′ 57.017″
| ||||||||||||||||||||||||||
This article is issued from Wikipedia - version of the Wednesday, February 25, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.