WASP-2
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Delphinus[1] |
| A[2] | |
| Right ascension | Template:RA[3] |
| Declination | Template:DEC[3] |
| Apparent magnitude (V) | +11.98[4] |
| CTemplate:Refn | |
| Right ascension | ~Template:RA[2] |
| Declination | ~Template:DEC[2] |
| Characteristics | |
| Spectral type | K1.5V + K2-M3[5] |
| Apparent magnitude (J) | Script error: No such module "val".[6] |
| Apparent magnitude (H) | Script error: No such module "val".[6] |
| Apparent magnitude (K) | Script error: No such module "val".[6] |
| Variable type | planetary transit[7] |
| Astrometry | |
| Radial velocity (Rv) | Script error: No such module "val".[3] km/s |
| Proper motion (μ) | RA: Script error: No such module "val". mas/yr[3] Dec.: Script error: No such module "val". mas/yr[3] |
| Parallax (π) | 6.5777±0.0270 mas[3] |
| Distance | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Orbit[8] | |
| Primary | WASP-2A |
| Companion | WASP-2B |
| Semi-major axis (a) | 106″ |
| Details | |
| WASP-2A | |
| Mass | Script error: No such module "val".[9] Template:Solar mass |
| Radius | Script error: No such module "val".[9] Template:Solar radius |
| Luminosity | Script error: No such module "val".[10] Template:Solar luminosity |
| Surface gravity (log g) | Script error: No such module "val".[9] cgs |
| Temperature | Script error: No such module "val".[9] K |
| Metallicity [Fe/H] | Script error: No such module "val".[11] dex |
| Rotational velocity (v sin i) | Script error: No such module "val".[11] km/s |
| Age | Script error: No such module "val".[9] Gyr |
| WASP-2B | |
| Mass | Script error: No such module "val".[9] Template:Solar mass |
| Temperature | Script error: No such module "val".[9] K |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist, 1SWASP J203054.12+062546.4, USNO-B1.0 0964-00543604, UCAC2 34018636[12] | |
| Database references | |
| SIMBAD | A |
| B | |
| Exoplanet Archive | data |
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WASP-2 is a binary star system located about 496 light-years away in the Delphinus constellation.[12] The primary is a magnitude 12 orange dwarf star, orbited by a red dwarf star on a wide orbit.[8][13] The star system shows an infrared excess noise of unknown origin.[14]
The primary star hosts one known exoplanet, WASP-2b.[15] Since the planet transits the star, the star is classified as a planetary transit variable and has received the variable star designation V357 Delphini.[7]
Binary star
In 2008 a study was undertaken of fourteen stars with exoplanets that were originally discovered using the transit method through relatively small telescopes. These systems were re-examined with the Script error: No such module "convert". reflector telescope at the Calar Alto Observatory in Spain. This star system, along with two others, was determined to be a previously unknown binary star system. The previously unknown secondary star is a dim magnitude 15 M-type star separated by about 111 AU from the primary, appearing offset from the primary by about one arc second in the images. This discovery resulted in a recalculation of parameters for both the planet and the primary star.[2]
A re-examination of the WASP-2 spectrum in 2015 resulted in the measurement of the stellar companion's temperature as Script error: No such module "val"., and an angular separation of 0.73 arcseconds.[16]
Planetary system
The primary star has one exoplanet, WASP-2b, a hot Jupiter detected by the SuperWASP project in 2006 using the transit method.[15]
Template:OrbitboxPlanet begin Template:OrbitboxPlanet
|}Script error: No such module "Check for unknown parameters".
See also
Notes
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References
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- ↑ Template:Cite constellation
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- ↑ a b c d e Template:Cite Gaia DR3
- ↑ Script error: No such module "Citation/CS1".
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- ↑ a b c Script error: No such module "Citation/CS1".
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- ↑ a b c d e f g Script error: No such module "Citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ a b Template:Cite simbad
- ↑ Script error: No such module "Citation/CS1".
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- ↑ a b 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".