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WASP-1b
Extrasolar planet List of extrasolar planets
300px
Size comparison of WASP-1b with Jupiter.
Parent star

<tr> <td colspan="2">Star</td> <td>WASP-1</td></tr><tr> <td colspan="2">Constellation</td> <td>Andromeda</td></tr><tr> <td>Right ascension</td> <td style="text-align: center">(α)</td> <td>00h 20m 40s</td></tr><tr> <td>Declination</td> <td style="text-align: center">(δ)</td> <td>+31° 59′ 24″</td></tr><tr> <td>Apparent magnitude</td> <td style="text-align: center">(mV)</td> <td>11.79</td></tr><tr><td colspan="2">Distance</td><td>1239 ly
(380 pc)</td></tr><tr><td colspan="2">Spectral type</td> <td>F7V</td></tr>

Orbital elements

<tr><td>Semimajor axis</td><td style="text-align: center">(a)</td> <td>0.0382 (± 0.0013) AU</td></tr><tr> <td>Eccentricity</td> <td style="text-align: center">(e)</td> <td>0</td></tr><tr><td>Orbital period</td><td style="text-align: center">(P)</td> <td>2.5199464 (± 8e-07) d</td></tr><tr> <td>Inclination</td> <td style="text-align: center">(i)</td> <td>88.65 (± 0.55)°</td></tr><tr> <td>Time of transit</td> <td style="text-align: center">(Tt)</td> <td>2454461.863 (± 0.0002) JD</td></tr>

Physical characteristics

<tr><td>Mass</td><td style="text-align: center">(m)</td><td>0.86 ± 0.07 MJ</td></tr><tr><td>Radius</td><td style="text-align: center">(r)</td><td>1.484 +0.06
−0.09
Template:Jupiter radius</td></tr><tr><td>Density</td><td style="text-align: center">(ρ)</td><td>476 kg m-3</td></tr><tr><td>Surface gravity</td><td style="text-align: center">(g)</td><td>12.5 m/s² (1.27 g)</td></tr><tr> <td>Temperature</td> <td style="text-align: center">(T)</td> <td>1800 K</td></tr>

Discovery information

<tr> <td colspan="2">Discovery date</td> <td>September 25, 2006</td></tr><tr> <td colspan="2">Discoverer(s)</td> <td>Cameron et al. (SuperWASP
and SOPHIE)
Template:Country data South Africa
and Template:Country data France</td></tr><tr> <td colspan="2">Discovery method</td> <td>Transit</td></tr><tr> <td colspan="2">Discovery site</td> <td>SAAO</td></tr><tr> <td colspan="2">Discovery status</td> <td>Published</td></tr>

Other designations
Garafia-1 (unofficial nickname)

<tr style="background-color: #A0B0FF;"><td align=center colspan=3>Database references</td></tr><tr valign=baseline><td colspan=2>Extrasolar Planets
Encyclopaedia
</td><td>data</td></tr><tr><td colspan=2>SIMBAD</td><td>data</td></tr>

WASP-1b is an extrasolar planet orbiting the star WASP-1 located 1,239 light-years away in the constellation Andromeda. In recognition of the regional support given to the project on La Palma, the discoverers gave the planet the alternative designation Garafia-1.

Orbit and massEdit

File:WASP-1 b rv.pdf

The planet's mass and radius indicate that it is a gas giant with a similar bulk composition to Jupiter. Unlike Jupiter, but similar to many other planets detected around other stars, WASP-1b is located very close to its star, and belongs to the class of planets known as hot Jupiters.

WASP-1 b was discovered via the transit method by SuperWASP, for which the star and planet are named. Follow-up radial velocity measurements confirmed the presence of an unseen companion, and allowed for the mass of WASP-1 b to be determined.[1]

See alsoEdit

ReferencesEdit

External linksEdit

Template:Commonscat-inline

Coordinates: Sky map 00h 20m 40s, +31° 59′ 24″

Template:Stars of Andromeda

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