HD 188015
| Observation data Epoch 2000 Equinox 2000 | |
|---|---|
| Constellation | Vulpecula |
| Right ascension | 19h 52m 04.5435s |
| Declination | +28° 06′ 01.356″ |
| Apparent magnitude (V) | 8.242 |
| Distance | 171.66 ly (52.63 pc) |
| Spectral type | G5IV |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 188015 is an 8th magnitude star about 172 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.
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.[1]
HD 18801 is in a binary star system, the second star is HD 188015 B, with a mass 0.210 of the Sun. [2]
| 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
References
- ↑ Marcy, Geoffrey W.; et al. (2005). "Five New Extrasolar Planets". The Astrophysical Journal. 619 (1): 570–584. Bibcode:2005ApJ...619..570M. doi:10.1086/426384.
- ↑ Open Exoplanet Catalogue HD 18801
External links
- "Notes for star HD 188015". The Extrasolar Planets Encyclopaedia.
Template:Subgiant-star
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