14 Andromedae

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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[citation needed]
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
Distance 258 ± 6 ly
(79 ± 2 pc)
Absolute magnitude (MV) 6.24[citation needed]
Details
Mass 2.2[2] M
Other designations
2MASS J23311742+3914102, BD+38°5023, GC 32703, HD 221345, HIP 116076, HR 8930, SAO 73311
Database references
SIMBAD data
Exoplanet Archive data
Extrasolar Planets
Encyclopaedia
data

14 Andromedae or 14 And is an orange giant star approximately 258 light-years away[1] in the constellation of Andromeda. The star is a suspected variable star. It is thought that 14 Andromedae was formerly an A- or F-type main-sequence star early in its life. As of 2008, an extrasolar planet is thought to be orbiting the star, being one of the few known planets to be orbiting an evolved intermediate-mass star.[2]

Planetary system[edit]

In 2008, a planet (designated 14 Andromedae b) 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 innermost planets around an evolved intermediate-mass star (such planets have only been discovered in clump giants).[2]

The 14 Andromedae system[3]
Companion
(in order from star)
Mass Semimajor axis
(AU)
Orbital period
(days)
Eccentricity Inclination Radius
b 5.33 ± 0.57 MJ 0.83 185.84 ± 0.23 0

See also[edit]

References[edit]

  1. ^ 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
  2. ^ a b c d 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. ^ 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[edit]


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