Spe (exoplanet)
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Exoplanet Spe |
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| Change in the radial velocity of Veritate through the orbiting planet Spe | |
| Constellation | Andromeda |
| Position equinox : J2000.0 |
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| Right ascension | 23h 31m 17.41346s |
| declination | + 39 ° 14 ′ 10.3092 ″ |
| Orbit data | |
| Central star | Veritate |
| Major semi-axis | 0.83 AU |
| eccentricity | 0 |
| Period of circulation | 185.84 ± 0.23 d |
| Further data | |
| Minimum dimensions | 4.8 M J |
| distance | 76.4 ± 4.1 pc |
| history | |
| discovery | Sato et al. |
| Date of discovery | 2008 |
| Catalog names | |
| 14 Andromedae b | |
Spe ( 14 Andromedae b , abbreviated b 14 And ) is an exoplanet that the approximately 249 light years from the sun distant giant Red Veritate ( 14 Andromedae ) in the constellation Andromeda orbits.
Origin of name
Like all exoplanets, Spe was originally designated with the star's official name and a lowercase letter, according to the order in which it was discovered. After a public IAU competition , it was given the official name Spe on December 15, 2015 , derived from the Latin word “Spes” for “hope”. The name originally proposed by the Thunder Bay Center of the Royal Astronomical Society of Canada was Spes , but has been modified to match that of the central star.
discovery
The planet was discovered as part of a measurement campaign started in 2001 by a Japanese team of astronomers led by Bunei Sato at the Okayama Astrophysical Observatory , during which the radial velocities of around 300 red giant stars of the spectral classes G and K were precisely measured. In July 2008, the discovery of five planets around the stars 14 Andromedae, 81 Ceti , 6 Lyncis , and HD 167042 was finally published.
properties
According to model calculations, Spe has a minimum mass of almost five masses of Jupiter and orbits Veritate in a circular orbit with an orbital radius of about 0.83 AU every 186 days . Because of its large mass, it must be a gas giant .
Individual evidence
- ↑ SIMBAD: Veritate. Retrieved January 5, 2016 .
- ↑ a b c d e NASA Exoplanet Archive: 14 And b. Retrieved January 5, 2016 .
- ^ A b International Astronomical Union: NameExoWorlds - The Approved Names. Retrieved January 5, 2016 .
- ↑ a b c Sato, B. et al .: Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD 167042 . arxiv : 0807.0268 .