HD 23127
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 03h 39m 23.64s[1] |
| Declination | –60° 04′ 40.2″[1] |
| Apparent magnitude (V) | +8.58 |
| Characteristics | |
| Spectral type | G2V |
| B−V color index | 0.65 |
| Variable type | “None” |
| Astrometry | |
| Radial velocity (Rv) | ? km/s |
| Proper motion (μ) | RA: 75.27 ± 0.67[1] mas/yr Dec.: 143.03 ± 0.68[1] mas/yr |
| Parallax (π) | 10.13 ± 0.67[1] mas |
| Distance | 320 ± 20 ly (99 ± 7 pc) |
| Absolute magnitude (MV) | 3.83 |
| Details | |
| Mass | 1.13 M☉ |
| Radius | ? R☉ |
| Surface gravity (log g) | ? cgs |
| Temperature | 5754 ± 135 K |
| Metallicity | +0.34 |
| Rotation | ~46.1 days |
| Age | 7.1 years |
| Other designations | |
CD-60°762, GSC 08867-00913, HIP 17054, SAO 248860 | |
| Database references | |
| SIMBAD | data |
HD 23127 is a star in the Reticulum constellation. At the distance of 320 ly,[1] it is not visible to the naked eye, but it is visible with a good pair of binoculars.
Star
HD 23127 is a hydrogen-fusing sun-like star with spectrum G2V. The star is more massive than our Sun at 1.13 solar mass. The star is also more metal-rich, meaning it contains two times more metals [Fe/H] than our Sun. It is older than the local star at 7 billion years, more than half-way through its life.
Planetary system
On Friday, February 9, 2007, a 1214 day period jovian planet was found by using the wobble method by O’Toole in Australia. It has minimum mass 37% greater than Jupiter and orbits in 44% eccentricity. The distance from the star ranges from 1.28 to 3.30 astronomical units with the average distance 2.29 AU.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >1.5 ± 0.2 MJ | 2.4 ± 0.3 | 1214 ± 9 | 0.44 ± 0.07 | — | — |
See also
- List of extrasolar planets
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 O'Toole, Simon J. et al. (2007). "New Planets around Three G Dwarfs". The Astrophysical Journal 660 (2): 1636–1641. arXiv:astro-ph/0702213. Bibcode:2007ApJ...660.1636O. doi:10.1086/513563.
External links
- "HD 23127". The Extrasolar Planets Encyclopedia.
Coordinates: 
03h 39m 23.639s, −60° 04′ 40.230″
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