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Extrasolar planet List of extrasolar planets 300pxSize comparison of COROT-1b with Jupiter. CoRoT-Exo-1b
Database references

COROT-1b[2] (previously named COROT-Exo-1b)[1] is an extrasolar planet approximately 1,560 light-years away in the constellation of Monoceros. The planet was discovered orbiting the yellow dwarf star COROT-1 in May 2007. The planet was the first discovery by the French-led COROT Mission.

## Detection and discovery Edit

The planet was announced by the COROT mission (a CNES project with European Space Agency participation). The planet is a large hot Jupiter, about 1.49 times the radius of Jupiter and approximately 1.03 times as massive, based on ground observations of the star. Its large size is due to its low density combined with the intense heating of its parent star causing the outer layers of the atmosphere to bloat.

## Observation of phases Edit

In May 2009 COROT-1b became the first extrasolar planet for which optical (as opposed to infrared) observations of phases were reported.[6] These observations suggest that there is not significant heat transfer between the (tidally locked) night and day sides of the planet.[7]

## Notes and references Edit

1. 1.0 1.1 Template:Cite mailing list
2. 2.0 2.1 2.2 2.3 Notes for planet CoRoT-1 b. Retrieved 2009-03-17.
3. 3.00 3.01 3.02 3.03 3.04 3.05 3.06 3.07 3.08 3.09 3.10 Template:Cite doi
4. The paper gives the semimajor axis as 4.92 ± 0.08 times the radius of the star, which is estimated at 1.11 ± 0.05 solar radii
5. Calculated using Newtonian gravity: $\textstyle g=\frac{GM}{R^2}$
6. (2009-05-28)The changing phases of extrasolar planet CoRoT-1b. Nature 459 (7246): 543–545.
7. Andrea Thompson (2009-05-27). Exoplanet Phases Seen in Optical Light. Space.com.