WASP-4
Artistic rendering of WASP-4 b | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Phoenix[1] |
| Right ascension | Template:RA[2] |
| Declination | Template:DEC[2] |
| Apparent magnitude (V) | Script error: No such module "val".[3] |
| Characteristics | |
| Evolutionary stage | Main sequence |
| Spectral type | G7V[4] |
| Apparent magnitude (V) | Script error: No such module "val".[3] |
| Apparent magnitude (B) | Script error: No such module "val".[3] |
| Variable type | Planetary transit variable[4] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[2] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[2] Dec.: Script error: No such module "val". mas/yr[2] |
| Parallax (π) | 3.6623±0.0147 mas[2] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Details | |
| Mass | Script error: No such module "val".[5] Template:Solar mass |
| Radius | Script error: No such module "val".[5] Template:Solar radius |
| Surface gravity (log g) | Script error: No such module "val".[5] cgs |
| Temperature | Script error: No such module "val".[5] K |
| Metallicity [Fe/H] | Script error: No such module "val".[6] dex |
| Rotation | Script error: No such module "val".[6] days |
| Rotational velocity (v sin i) | Script error: No such module "val".[6] km/s |
| Age | Script error: No such module "val".[6] Gyr |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[7] | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
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WASP-4 is a G-type main-sequence star approximately 891 light-years away in the constellation of Phoenix.[4][1][2] Despite its advanced age, the star is rotating rapidly, being spun up by the tides raised by a giant planet on a close orbit.[8]
Planetary system
In 2007 the exoplanet WASP-4b was discovered orbiting this star. With an orbital period of just 1.3 days, it is classified as a hot Jupiter.[4] The planet's orbital period appears to be decreasing at a rate of Script error: No such module "val". milliseconds per year, suggesting that its orbit is decaying, with a decay timescale of 15.77±1.57 million years. Another superjovian planet in the system is suspected.[9] The orbital decay was confirmed in a 2025 study.[5]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet Template:OrbitboxPlanet hypothetical
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See also
References
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- ↑ a b Template:Cite constellation
- ↑ a b c d e f Template:Cite Gaia DR3
- ↑ a b c Script error: No such module "Citation/CS1". Vizier catalog entry
- ↑ a b c d Script error: No such module "Citation/CS1".
- ↑ a b c d e Script error: No such module "Citation/CS1".
- ↑ a b c d Script error: No such module "Citation/CS1".
- ↑ Template:Cite simbad
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "citation/CS1".
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External links
- Script error: No such module "citation/CS1".
- Script error: No such module "citation/CS1".