en>AvicAWB: clean up, removed orphan tag using AWB

2011-09-17T03:13:22Z

clean up, removed orphan tag using AWB

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{{Use dmy dates|date=July 2013}}
{{Planetbox begin
| name = COROT-2b
}}
{{Planetbox image
| image = Exoplanet Comparison CoRoT-2 b.png
| caption = Size comparison of COROT-2b with Jupiter.
}}
{{Planetbox star
| star = [[COROT-2]]
| constell = [[Aquila (constellation)|Aquila]]
| dist_ly = 930
| dist_pc = 290
| RA = 19h 27m 06.5s<ref name="alonso08">
{{cite journal
| author = Alonso ''et al ''
| title = Transiting exoplanets from the CoRoT space mission. II. CoRoT-Exo-2b: a transiting planet around an active G star
| journal = [[Astronomy and Astrophysics]]
| volume = 482
| issue = 3
| year = 2008
| pages = L21–L24
| doi=10.1051/0004-6361:200809431
| bibcode=2008A&A...482L..21A
|arxiv = 0803.3207 }}</ref>
| DEC = +1° 23′ 01.5″|<ref name="alonso08" />
| class = G7V<ref name="bouchy08" />
}}
{{Planetbox orbit
| semimajor = 0.0281 ± 0.0005<ref name="alonso08" /><ref>The paper gives the semimajor axis as 6.70 ± 0.03 times the radius of the star, which is estimated at 0.902 ± 0.018 solar radii.</ref>
| eccentricity = 0 (assumed)<ref name="alonso08" />
| period = 1.7429964 ± 0.0000017<ref name="alonso08" />
| inclination = 87.84 ± 0.10<ref name="alonso08" />
| t_transit = 2454237.53562 ± 0.00014<ref name="alonso08" />
}}
{{Planetbox character
| mass = 3.31 ± 0.16<ref name="alonso08" />
| radius = 1.429 ± 0.047<ref name="alonso08" />
| density = 1310 ± 40<ref name="alonso08" />
| gravity = 38.2<ref>Calculated using Newtonian gravity: <math>\textstyle g=\frac{GM}{R^2}</math></ref>
| geometric_albedo = <0.12
| temperature = 1537 ± 35<ref name="alonso08" />
}}
{{Planetbox discovery
| discovery_date = 2007-12-??, announced 2007-12-20
| discoverers = Corot mission
| discovery_method = Transit method
| detection_methods = Radial velocity, Reflection/emission modulations
| discovery_site = Earth's orbit
| discovery_status = Confirmed
}}
{{Planetbox catalog
| names=CoRoT-Exo-2b}}
{{Planetbox reference
| star=CoRoT-2
| planet=b
| simbad=CoRoT-Exo-2b
}}
{{Planetbox end}}

'''COROT-2b''' (formerly known as '''COROT-Exo-2b'''<ref>{{cite mailing list|url=http://listes.obs.ujf-grenoble.fr/wws/arc/exoplanets/2009-03/msg00003.html|title=Change in CoRoT planets names|author=Schneider, J.|date=10 March 2009|accessdate=2009-03-19|mailinglist=Exoplanets}}</ref>) is the second [[extrasolar planet]] to be detected by the French-led [[COROT]] mission, and orbits the star [[COROT-2]] at a distance of 930 [[light year]]s from [[Earth]] towards the constellation [[Aquila (constellation)|Aquila]]. Its discovery was announced on 20 December 2007.<ref>
{{cite web | title = COROT surprises a year after launch | url = http://www.esa.int/SPECIALS/COROT/SEMF0C2MDAF_0.html | accessdate = 2007-12-21}}</ref> After its discovery via the [[methods of detecting extrasolar planets|transit method]], its mass was confirmed via the radial velocity method.

== Characteristics ==
[[Image:CoRoT-2 b rv.pdf|thumb|left|275px|The radial velocity trend of COROT-2, caused by the presence of COROT-2 b.]]

The planet is a large [[hot Jupiter]], about 1.43 times the radius of [[Jupiter]] and approximately 3.3 times as massive. Its huge size is due to the intense heating from its parent star, which causes the outer layers of its atmosphere to bloat. The extremely large radius of the planet indicates that COROT-2b is really hot, estimated to be around 1500 K, even hotter than would be expected given its location close to its parent star. This fact may be a sign of [[tidal heating]] due to interactions with another planet.<ref>{{cite web | title = CoRoT-exo-2 c? | url = http://oklo.org/?p=262 | accessdate = 2007-12-21}}</ref> At Jupiter-like distances its radius would roughly be the same as Jupiter.<ref>{{cite journal | title=Planetesimals to Brown Dwarfs: What is a Planet? | date=20 August 2006 | pages=193–216 | author1=Gibor Basri | volume=34 | author2=Brown | doi=10.1146/annurev.earth.34.031405.125058 | journal=Ann.Rev.Earth Planet.Sci. | arxiv=astro-ph/0608417 |bibcode = 2006AREPS..34..193B }}</ref>
The complete phase curve of this planet has been observed.<ref>http://adsabs.harvard.edu/abs/2011sptz.prop80044C</ref>

COROT-2b orbits its star approximately once every 1.7 days, and orbits the star in a [[Direct motion|prograde]] direction close to the star's [[equator]].<ref name="bouchy08">
{{cite doi|10.1051/0004-6361:200809433 }}</ref> Its parent star is a [[Stellar classification|G-type]] star, a bit cooler than the [[Sun]] but more [[Solar variation|active]]. It is located about 800 [[light-year]]s from Earth.

It takes 125 minutes to [[Astronomical transit|transit]] its star.<ref name="transitsearch">{{cite web |title=Predicted Transit Epochs: CoRoTExo2 b |publisher=[http://transitsearch.org TransitSearch] (Oklo Corporation) |url=http://207.111.201.70/transitsearch/dynamiccontent/CoRoTExo2b.transits.txt |accessdate=2009-07-15}}</ref>

As of August 2008, the COROT-2b spin-orbit angle (that is, the angle between the [[equator]] of the star and the plane of the planet [[orbit]]) was calculated by Bouchy ''et al.'' by mean of the [[Rossiter-McLaughlin effect]]<ref>{{cite arXiv | title= Measuring accurate transit parameters | author=Joshua N. Winn | eprint=0807.4929 |class=astro-ph |year=2008 | doi= 10.1017/S174392130802629X}}</ref> with a value of +7.2 ± 4.5 degrees.<ref name="bouchy08"/>

== References ==
{{reflist}}

== External links ==
{{commonscat-inline|CoRoT-2 b|COROT-2b}}
* [http://www.perseus.gr/Astro-Photometry-CoRoTExo2-20080606.htm COROT-Exo-2 light curve using differential photometry]

{{Sky|19|27|06.5|+|01|23|01.5|930}}

{{DEFAULTSORT:Corot-2b}}
[[Category:Exoplanets]]
[[Category:Hot Jupiters]]
[[Category:Transiting exoplanets]]
[[Category:Gas giants]]
[[Category:Exoplanets discovered in 2007]]
[[Category:Exoplanets discovered by the COROT program|2b]]
[[Category:Aquila (constellation)]]

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en>AvicAWB: clean up, removed orphan tag using AWB