HD 104985

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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
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
Tonatiuh, BD+77° 461, HIP 58952, HR 4609, NLTT 29548, SAO 7500.
Database references
SIMBAD data
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[edit]

References[edit]

External links[edit]

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