HD 188015
HD 188015 is an 8th magnitude star about 165.5 light-years away in the constellation of Vulpecula. It is a yellow subgiant, a Sun-like star that has ceased or is about to stop hydrogen fusion in its core. However, it is only slightly brighter than the Sun, but probably much older.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Vulpecula |
| Right ascension | 19h 52m 04.5430s[1] |
| Declination | +28° 06′ 01.3417″[1] |
| Apparent magnitude (V) | 8.242 |
| Characteristics | |
| Spectral type | G5IV |
| Astrometry | |
| Proper motion (μ) | RA: 52.544±0.064[1] mas/yr Dec.: −91.934±0.058[1] mas/yr |
| Parallax (π) | 19.7065 ± 0.0422[1] mas |
| Distance | 165.5 ± 0.4 ly (50.7 ± 0.1 pc) |
| Details | |
| Other designations | |
| Database references | |
| SIMBAD | data |
The star is almost twice as metal-rich as the Sun. Planets are common around such stars, and this star also has one known planet orbiting it.[3]
HD 188015 is in a binary star system, the second star is HD 188015 B, with a mass 0.210 of the Sun.[4]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| c (unconfirmed) | >0.07 MJ | 0.08 | 8.386 | 0.23 | — | — |
| b | >1.50 ± 0.13 MJ | 1.203 ± 0.070 | 461.2 ± 1.7 | 0.137 ± 0.026 | — | — |
See also
- HD 187085
- List of extrasolar planets
References
- Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- "HD 188015". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2018-10-21.
- Marcy, Geoffrey W.; et al. (2005). "Five New Extrasolar Planets". The Astrophysical Journal. 619 (1): 570–584. Bibcode:2005ApJ...619..570M. CiteSeerX 10.1.1.516.6667. doi:10.1086/426384.
- Open Exoplanet Catalogue HD 18801
External links
- "Notes for star HD 188015". The Extrasolar Planets Encyclopaedia.
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