14 Andromedae b

From Wikipedia, the free encyclopedia
Jump to: navigation, search
14 Andromedae b
Extrasolar planet List of extrasolar planets
14 And b rv.pdf
Radial velocity changes over time of 14 Andromedae caused by the orbit of 14 Andromedae b.
Parent star
Star 14 Andromedae
Constellation Andromeda
Right ascension (α) 23h 31m 17.41s[1]
Declination (δ) +39° 14′ 10.3″[1]
Apparent magnitude (mV) 5.22
Distance 258 ± 6[1] ly
(79 ± 2[1] pc)
Spectral type K0III
Orbital elements
Semimajor axis (a) 0.83 AU
(124 Gm)
    11 mas
Periastron (q) 0.82 AU
(123 Gm)
Apastron (Q) 0.84 AU
(125 Gm)
Eccentricity (e) 0[2]
Orbital period (P) 185.84±0.23[2] d
(0.50942 y)
Time of periastron (T0) 2861.4 ± 1.5 JD
Physical characteristics
Mass (m) 5.33 ± 0.57[2] MJ
Discovery information
Discovery date July 3, 2008
Discoverer(s) Sato et al.[3]
Discovery method Doppler Spectroscopy[3]
Discovery status Published[3]
Other designations
HD 221345 b
Database references
Extrasolar Planets
Exoplanet Archive data

14 Andromeda b or 14 And b is an extrasolar planet approximately 249 light years away in the constellation of Andromeda. The 186-day period planet orbits about 83% the Earth-Sun distance from the giant star 14 Andromedae. It has a minimum mass 4.8 times the mass of Jupiter. The planet orbits with an eccentricity of 0.0094, which means the orbital distance over the course of its revolution varies by only 0.02 AU. This planet was discovered on July 3, 2008 by Sato et al., who discovered the wobbling of 14 Andromedae caused by the planet’s gravity during its orbit with the Doppler spectroscopy.[3]

See also[edit]


  1. ^ a b c d 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 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. 
  3. ^ 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. 

External links[edit]

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