14 Andromedae

14 Andromedae
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Andromeda
Right ascension 23h 31m 17.41s[1]
Declination +39° 14′ 10.3″[1]
Apparent magnitude (V) 5.22
Characteristics
Spectral type K0 III[2]
U−B color index 0.87
B−V color index 1.02
Variable type Suspected
Astrometry
Radial velocity (Rv)-58.8 km/s
Proper motion (μ) RA: 286.72 ± 0.23[1] mas/yr
Dec.: -84.22 ± 0.17[1] mas/yr
Parallax (π)12.63 ± 0.27[1] mas
Distance258 ± 6 ly
(79 ± 2 pc)
Absolute magnitude (MV)6.24
Details
Mass2.2[2] M☉
Other designations
Veritate, 2MASS J23311742+3914102, BD+38°5023, GC 32703, HD 221345, HIP 116076, HR 8930, SAO 73311
Database references
SIMBADdata
Exoplanet Archivedata
Extrasolar Planets
Encyclopaedia		data

14 Andromedae (abbreviated 14 And), also named Veritate, is an orange giant star of spectral type K0III situated approximately 258 light-years away[1] in the constellation of Andromeda. As of 2008, an extrasolar planet (designated 14 Andromedae b, later named Spe) is thought to be orbiting the star.[2]

14 Andromedae is a suspected variable star. It is thought it was formerly an A- or F-type main-sequence star early in its life.

Nomenclature

14 Andromedae is the star's Flamsteed designation. Following its discovery the planet was designated 13 Andromedae 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 Veritate for this star and Spe for its planet.[5]

The winning names were based on those submitted by the Thunder Bay Centre of the Royal Astronomical Society of Canada[6]); namely 'Veritas' and 'Spes', Latin for 'truth' and 'hope', respectively. (Veritas was also the Roman goddess of truth and Spes was the Roman goddess of hope.) The IAU substituted the ablative forms 'Veritate' and 'Spe', which mean 'where there is truth' and 'where there is hope', respectively. This was because 'Veritas' is the name of an asteroid important for the study of the solar system.[7]

Planetary system

In 2008, a planet was announced to be orbiting the star. The planet was found to have a minimum mass of 4.8 Jupiter masses and orbiting in a circular orbit that takes 186 days to complete. The planet is one of the few known planets to be orbiting an evolved intermediate-mass star and one of the innermost (such planets have only been discovered in clump giants).[2]

The 14 Andromedae planetary system[8]
Companion
(in order from star)		 Mass Semimajor axis
(AU)		 Orbital period
(days)		 Eccentricity Inclination Radius
b (Spe) 5.33 ± 0.57 MJ 0.83 185.84 ± 0.23 0 — —

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. 1 2 3 4 Sato, Bun'ei; et al. (2008). "Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD167042". Publications of the Astronomical Society of Japan 60 (6): 1317–1326. arXiv:0807.0268. Bibcode:2008PASJ...60.1317S. doi:10.1093/pasj/60.6.1317.
  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. ↑ Thunder Bay Amateur Astronomers Name a Planet
  7. ↑ NameExoWorlds The Approved Names
  8. ↑ Ligi, R.; et al. (2012). "A new interferometric study of four exoplanet host stars : θ Cygni, 14 Andromedae, υ Andromedae and 42 Draconis". Astronomy and Astrophysics 545. A5. arXiv:1208.3895. Bibcode:2012A&A...545A...5L. doi:10.1051/0004-6361/201219467.

External links

Coordinates: 23h 31m 17.4139s, +39° 14′ 10.313″

This article is issued from Wikipedia - version of the Thursday, December 17, 2015. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.