HD 104985
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Camelopardalis |
| Right ascension | 12h 05m 15.119s[1] |
| Declination | +76° 54′ 20.65″[1] |
| Apparent magnitude (V) | 5.79 |
| Characteristics | |
| Spectral type | G9III |
| B−V color index | 1.029 |
| Astrometry | |
| Proper motion (μ) | RA: 147.68 ± 0.25[1] mas/yr Dec.: –91.65 ± 0.19[1] mas/yr |
| Parallax (π) | 10.30 ± 0.25 mas[1] |
| Distance | 317 ± 8 ly (97 ± 2 pc) |
| Absolute magnitude (MV) | 0.75 |
| Details | |
| Mass | 1.5 M☉ |
| Radius | 10.87 ± 0.36 R☉ |
| Luminosity | 55.5 L☉ |
| Surface gravity (log g) | 0,354567676 g cgs |
| Temperature | 4786 K |
| Metallicity [Fe/H] | –0.35 dex |
| Age | 2.95 ± 0.65 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Data sources: | |
| Hipparcos Catalogue, CCDM (2002), Bright Star Catalogue (5th rev. ed.) | |
HD 104985 or Tonatiuh is a helium-fusing yellow giant star in the constellation of Camelopardalis. It is located 317 ly or 97 parsecs away from Earth.[1] In 2003, an extrasolar planet was discovered in orbit around the star.[2]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b (Meztli) | >8.3 MJ | 0.95 | 199.505 ± 0.085 | 0.090 ± 0.009 | — | — |
The planet and its host star is one of the planetary systems selected by the International Astronomical Union as part of their public process for giving proper names to exoplanets and their host star (where no proper name already exists).[4][5] The process involved public nomination and voting for the new names.[6] In December 2015, the IAU announced the winning names were Tonatiuh for the star and Meztli for the planet.[7]
See also
References
- ^ a b c d e f 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
- ^ Sato, Bun'ei; et al. (2003). "A Planetary Companion to the G-Type Giant Star HD 104985". The Astrophysical Journal Letters. 597 (2): L157–L160. Bibcode:2003ApJ...597L.157S. doi:10.1086/379967.
- ^ Sato, Bun'ei; et al. (2008). "Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Delphini, ξ Aquilae and HD 81688". Publications of the Astronomical Society of Japan. 60 (3): 539–550. arXiv:0802.2590. Bibcode:2008PASJ...60..539S. doi:10.1093/pasj/60.3.539.
- ^ NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. IAU.org. 9 July 2014
- ^ NameExoWorlds.
- ^ NameExoWorlds.
- ^ Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.
External links
| Stars |
| ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| |||||||||||||
| |||||||||||||
| |||||||||||||
| Galaxies |
| ||||||||||||
| |||||||||||||
| |||||||||||||
 | This giant-star-related article is a stub. You can help Wikipedia by expanding it. |