HD 103774
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Corvus |
| Right ascension | 11h 56m 56s |
| Declination | −12° 6′ 28″ |
| Apparent magnitude (V) | 7.12 ± 0.01 |
| Characteristics | |
| Spectral type | F5V |
| Astrometry | |
| Parallax (π) | 18.03± 0.52 mas |
| Distance | 181 ly (55 ± 2 pc) |
| Details | |
| Mass | 1.335 ± 0.03 M☉ |
| Radius | ? R☉ |
| Luminosity | 3.5± 0.3 L☉ |
| Surface gravity (log g) | 4.26 ± 0.13 cgs |
| Temperature | 6489 ± 77 K |
| Metallicity | 0.28 ± 0.06 |
| Age | 1.05 ± 0.64 × 109 years |
| Other designations | |
HIP 58263 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
| Extrasolar Planets Encyclopaedia | data |
HD 103774 is a young white main-sequence star.
Planetary system
From 2003 to 2012, the star was under observance from HARPS.
In 2012, a hot Saturn-mass[1] planet was deduced by radial velocity. This was published in January 2013.
Also probable is a dust field, with grains of 12 micrometres.
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | >0.367 ± 0.022 MJ | 0.07 ± 0.001 | 5.8881 ± 0.0005 | 0.09 ± 0.04 | — | — |
References
- ↑ The preprint listed this as "roughly the mass of Neptune" but it is much more massive than that.
- ↑ "hd_103774_b".
- ↑ G. Lo Curto et al. (2013). "The HARPS search for southern extrasolar planets: XXXVI. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone". arXiv:1301.2741. Bibcode:2013arXiv1301.2741L.
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