HD 102956 b
Coordinates: 
11h 51m 23.0s, +57° 38′ 27″
11h 51m 23.0s, +57° 38′ 27″JD | |
| 301±33 º | |
| Semi-amplitude | 74.6±1.8 m/s |
| Star | HD 102956 |
| Physical characteristics[2] | |
| Mass | ≥0.960±0.023 MJ |
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 11h 51m 22.5111s[3] |
| Declination | +57° 38′ 26.6427″[3] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | A |
| Absolute magnitude (MV) | 2.5 |
| Details | |
Rotational velocity (v sin i) | 0.30 km/s |
| Database references | |
Exoplanet Archive | data |
HD 102956 b or Isagel is an
Keck Observatory in Hawaii. HD 102956 b is in the orbit of host star HD 102956. The planet is at least the mass of Jupiter, orbiting every 6.5 days at a distance of 12 million km. HD 202956 b has a very circular orbit.[1]
The system is roughly 399 light years from us.
Discovery and nomenclature
Henry Draper catalog
. The designation of b is given to the first planet orbiting a given star.
The star is one of the 2.5 million brightest stars in the sky and is part of the Tycho-2 Catalogue. It is not visible to the naked eye with an apparent magnitude of 8.
NameExoWorlds
In 2019 this planet was announced as part of the
IAU NameExoWorlds project[5] where it was designated as the planet that will be named by Sweden. The winning proposal was Isagel, from Nobel laureate Harry Martinson's space poem Aniara.[6]
Host star
HD 102956 (Aniara) is an orange subgiant with a mass and radius of 1.68 M☉ and 4.4 R☉, respectively. The surface temperature is about 5,054 K (4,781 °C). The star is 11.6 times brighter than the Sun. The star's age is estimated at 2.3 billion years.
References
- ^ .
- ^ S2CID 102486961.
- ^ .
- ^ "HD 102956". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-21.
- ^ "Name an exoplanet (press release)". 2019-06-06. Archived from the original on 2019-06-08. Retrieved 2019-06-13.
- ^ "Rymddikt gav namn åt Sveriges exoplanet" (in Swedish). 2019-12-17. Archived from the original on 2020-01-12. Retrieved 2021-08-10.