HD 131496
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes[1] |
Right ascension | 14h 53m 23.028s[2] |
Declination | +18° 14′ 07.47″[2] |
Apparent magnitude (V) | 7.96[3] |
Characteristics | |
Evolutionary stage | subgiant[3] |
Spectral type | K0[4] |
B−V color index | 1.039±0.013[1] |
Absolute magnitude (MV) | 2.8[3] |
Details Gyr | |
Database references | |
SIMBAD | data |
HD 131496 is an
Stars like HD 131496 are sometimes referred to as "retired A-stars", since they would have been
HD 131496 and its planet, HD 131496b, were chosen as part of the 2019 NameExoWorlds campaign organised by the International Astronomical Union, which assigned each country a star and planet to be named. HD 131496 was assigned to Andorra. The winning proposal for the name of the star was Arcalís, after a mountain peak in northern Andorra where the Sun shines through a gap twice a year at fixed dates, leading to its use as a primitive Solar calendar. The planet was named Madriu, after a glacial valley and river in southeastern Andorra that forms the major part of the Madriu-Perafita-Claror UNESCO World Heritage Site.[8]
Planetary system
An exoplanet was discovered in 2011. It has a mass at least 2.2 times that of Jupiter and is orbiting at a distance of 2.09 astronomical units (AU) once every 883 days.[3]
Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
---|---|---|---|---|---|---|
b / Madriu
|
≥2.2±0.2 MJ | 2.09±0.07 | 883±29 | 0.163±0.073 | — | — |
References
- ^ S2CID 119257644.
- ^ S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ S2CID 15088371.
- Bibcode:1993yCat.3135....0C.
- ^ .
- ^ "HD 131496". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-12-24.
- ISSN 0004-637X.
- ^ "Andorra". NameExoworlds. Retrieved 2024-01-27.
- ^ HD 131496 b on exoplanet.eu