Astronomy:HD 109246
| Observation data Equinox J2000.0]] (ICRS) | |
|---|---|
| Constellation | Draco[1] |
| Right ascension | 12h 32m 07.18754s[2] |
| Declination | +74° 29′ 22.3681″[2] |
| Apparent magnitude (V) | 8.75[1] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | G0V[3] |
| B−V color index | 0.645[1] |
| Astrometry | |
| Radial velocity (Rv) | −19.31±0.18[2] km/s |
| Proper motion (μ) | RA: −171.665[2] mas/yr Dec.: −48.488[2] mas/yr |
| Parallax (π) | 14.7174 ± 0.0148[2] mas |
| Distance | 221.6 ± 0.2 ly (67.95 ± 0.07 pc) |
| Absolute magnitude (MV) | 4.66[1] |
| Details[3] | |
| Mass | 1.01±0.11 M☉ |
| Radius | 1.02±0.07 R☉ |
| Surface gravity (log g) | 4.46±0.19 cgs |
| Temperature | 5844±21 K |
| Metallicity [Fe/H] | 0.10±0.05 dex |
| Rotational velocity (v sin i) | 3±1 km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HD 109246, also named Funi, is a G-type main-sequence star in the constellation Draco. It is located 222 light-years from the Sun. The star hosts one known exoplanet, which was discovered in 2010.[5]
Nomenclature
The designation HD 109246 comes from the Henry Draper Catalogue.
This was one of the systems selected to be named in the 2019 NameExoWorlds campaign during the 100th anniversary of the IAU, which assigned each country a star and planet to be named. This system was assigned to Iceland. The approved names were Funi for the star, an old Icelandic word meaning fire or blaze, and Fold for the planet, meaning earth or soil.[6]
Planetary system
HD 109246 b (later named Fold) is a gas giant exoplanet.[5] The discovery came from using the radial velocity method with SOPHIE spectrograph at the Haute-Provence Observatory.[3] HD 109246 b holds a minimum mass of 0.77 Jupiter masses. It orbits every 68.27 days at a semi-major axis of 0.33 AU.[7][8][9] The eccentricity is 0.12.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b / Fold | ≥0.77±0.09 MJ | 0.33±0.08 | 68.27±0.13 | 0.12±0.04 | — | — |
References
- ↑ 1.0 1.1 1.2 1.3 Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters 38 (5): 331. doi:10.1134/S1063773712050015. Bibcode: 2012AstL...38..331A XHIP record for this object at VizieR.
- ↑ 2.0 2.1 2.2 2.3 2.4 Vallenari, A. et al. (2022). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy & Astrophysics. doi:10.1051/0004-6361/202243940 Gaia DR3 record for this source at VizieR.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Boisse, I.; Eggenberger, A. et al. (November 2010). "The SOPHIE search for northern extrasolar planets. III. A Jupiter-mass companion around HD 109246". Astronomy and Astrophysics 523: A88. doi:10.1051/0004-6361/201014909. Bibcode: 2010A&A...523A..88B.
- ↑ "HD 109246". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=HD+109246.
- ↑ 5.0 5.1 "HD 109246 b". NASA Exoplanet Catalog. https://science.nasa.gov/exoplanet-catalog/hd-109246-b/.
- ↑ "Approved names". IAU. https://nameexoworlds.iau.org/final-results.
- ↑ "HD 109246 Overview". NASA Exoplanet Archive (Caltech/IPAC). https://exoplanetarchive.ipac.caltech.edu/overview/HD%20109246.
- ↑ "HD 109246 b". Exoplanet Kyoto Database. https://www.exoplanetkyoto.org/exohtml/HD_109246_b.html.
- ↑ "HD 109246 b". Shadab Chowdhury Exoplanet Blog. https://shadabchow.com/blogs/exoplanets/00529-hd-109246-b.
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