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 | F6 V[1] |
| Astrometry | |
| Parallax (π) | 18.03 ± 0.52 mas |
| Distance | 181 ± 5 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 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 103774 is a young yellow-white main-sequence star of apparent magnitude 7.12 that is 181 ± 5 light-years distant from Earth. It is 1.335 ± 0.03 times as massive and 3.5 ± 0.3 as luminous as the Sun.[2]
Planetary system
From 2003 to 2012, the star was under observation from HARPS.
In 2012, a hot Saturn-mass[3] planet was deduced by radial velocity. This result 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
- ^ Houk, N.; Swift, C. (1999), "Michigan catalogue of two-dimensional spectral types for the HD Stars", Michigan Spectral Survey, vol. 5, Ann Arbor, Michigan: Department of Astronomy, University of Michigan, Bibcode:1999MSS...C05....0H.
- ^ a b Lo Curto, G.; Mayor, M.; Benz, W.; Bouchy, F.; Hébrard, G.; Lovis, C.; Moutou, C.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Segransan, D.; Udry, S. (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". Astronomy & Astrophysics. 551: 7. arXiv:1301.2741. Bibcode:2013A&A...551A..59L. doi:10.1051/0004-6361/201220415. A59.
- ^ The preprint listed this as "roughly the mass of Neptune" but it is much more massive than that.
- ^ "hd_103774_b".
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