HD 104985

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[1] mas
Distance317 ± 8 ly
(97 ± 2 pc)
Absolute magnitude (MV)0.75
Details
Mass1.5 M☉
Radius10.87 ± 0.36 R☉
Luminosity55.5 L☉
Surface gravity (log g)0,354567676 g cgs
Temperature4786 K
Metallicity [Fe/H]–0.35 dex
Age2.95 ± 0.65 Gyr
Other designations
Tonatiuh, BD+77° 461, HIP 58952, HR 4609, NLTT 29548, SAO 7500.
Database references
SIMBADdata
Extrasolar Planets
Encyclopaedia		data
Data sources:
Hipparcos Catalogue,
CCDM (2002),
Bright Star Catalogue (5th rev. ed.)

HD 104985, also named Tonatiuh, is a helium-fusing yellow giant star located 97 parsecs (317 lys) from the Sun[1] in the constellation of Camelopardalis. An extrasolar planet (designated HD 104985 b, later named Meztli) is believed to orbit the star.

HD 104985 is the star's entry in the Henry Draper Catalogue. Following its discovery in 2003[2] the planet was designated HD 104985 b. In July 2014 the International Astronomical Union launched a process for giving proper names to certain exoplanets and their host stars.[3] The process involved public nomination and voting for the new names.[4] In December 2015, the IAU announced the winning names were Tonatiuh for this star and Meztli for its planet.[5]

The winning names were those submitted by the Sociedad Astronomica Urania of Morelos, Mexico. 'Tonatiuh' was the Aztec god of the Sun; 'Meztli' was the Aztec goddess of the Moon.[6]

The HD 104985 planetary system[7]
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 — —

See also

References

  1. 1 2 3 4 5 6 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. ↑ 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.
  3. ↑ NameExoWorlds: An IAU Worldwide Contest to Name Exoplanets and their Host Stars. IAU.org. 9 July 2014
  4. ↑ NameExoWorlds The Process
  5. ↑ Final Results of NameExoWorlds Public Vote Released, International Astronomical Union, 15 December 2015.
  6. ↑ NameExoWorlds The Approved Names
  7. ↑ 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.

External links

Coordinates: 12h 05m 15.1178s, +76° 54′ 20.641″


This article is issued from Wikipedia - version of the Thursday, December 31, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.