WASP-28
F-type star in the Pisces constellation
From Wikipedia, the free encyclopedia
WASP-28 is a F8V-type main sequence star located 1116 light-years from Earth in the constellation of Pisces. It has a mass of 0.9 solar masses and a radius of 1.08 solar radii.[6] It is an aged and cool star being around 5 billion years old and having a temperature at around 6100 Kelvin.[3]
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Pisces[1] |
| Right ascension | 23h 34m 27.88149s[2] |
| Declination | −01° 34′ 48.1101″[2] |
| Apparent magnitude (V) | 12.03[3] |
| Characteristics | |
| Evolutionary stage | main sequence[2] |
| Spectral type | F8[3] |
| Astrometry | |
| Radial velocity (Rv) | +25.20±1.08[2] km/s |
| Proper motion (μ) | RA: +22.422 mas/yr[2] Dec.: +10.591 mas/yr[2] |
| Parallax (π) | 2.9215±0.0151 mas[2] |
| Distance | 1,116 ± 6 ly (342 ± 2 pc) |
| Details[3] | |
| Mass | 0.993±0.067[4] M☉ |
| Radius | 1.083±0.025[4] R☉ |
| Surface gravity (log g) | 4.370±0.018 cgs |
| Temperature | 6150±140 K |
| Metallicity [Fe/H] | −0.29±0.10 dex |
| Rotational velocity (v sin i) | 3.25±0.34 km/s |
| Age | 5.5±2.6[4] Gyr |
| Other designations | |
| K2-1, EPIC 246375295, TOI-4518, TIC 398572544, WASP-28, 2MASS J23342787-0134482[5] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
Planetary system
The only known exoplanet orbiting around this star is WASP-28b, a highly irradiated and inflated hot Jupiter. It has a mass of 0.9 Jupiters and a radius of 1.3 Jupiters. It orbits at a distance of 0.044 AU taking about 3.4 days to complete an orbit around its star. The orbit has an eccentricity of 0.975 and an inclination of 88.61°.[3]
| Companion (in order from star) |
Mass | Semimajor axis (AU) |
Orbital period (days) |
Eccentricity | Inclination | Radius |
|---|---|---|---|---|---|---|
| b | 0.889±0.058 MJ | 0.0442±0.0010 | 3.40883495(15) | <0.075 | 88.514±0.090° | 1.219±0.028 RJ |