HD 80606 b
K[5] | |
HD 80606 b (also Struve 1341 Bb or HIP 45982 b) is an
Discovery
The variable radial velocity of HD 80606 was first noticed in 1999 from observations with the 10-m Keck 1 telescope at the W. M. Keck Observatory in Hawaii by the G-Dwarf Planet Search, a survey of nearly 1000 nearby G dwarfs to identify extrasolar planet candidates. The star was then followed up by the Geneva Extrasolar Planet Search team using the ELODIE spectrograph mounted on the 1.93-m telescope at the Haute-Provence Observatory. The discovery of HD 80606 b was announced on 4 April 2001.[2][1]
The transit was detected using a
The transit of 14 January 2010 was partially observed by MOST; but there were equipment failures over part of this time, and the 8 January secondary transit was entirely lost.[8] The midpoint of the next transit was 1 February 2013 11:37 UT.[9]
Physical properties
HD 80606 b has the most eccentric orbit of any known planet after HD 20782 b. Its eccentricity is 0.9336, comparable to Halley's Comet. The eccentricity may be a result of the Kozai mechanism, which would occur if the planet's orbit is significantly inclined to that of the binary stars. This interpretation is supported by measurements of the Rossiter–McLaughlin effect, which indicate that the planet's orbit may be significantly inclined (by 42±8°)[10][11] to the rotational axis of the star, a configuration which would be expected if the Kozai mechanism were responsible for the orbit.[4]
As a result of this high eccentricity, the planet's distance from its star varies from 0.03 to 0.88
An observer above the cloud tops of the gas giant would see the parent star swell to 30 times the
The planet's
Weather
The planet has wild variations in its weather as it orbits its parent star. Computer models predict the planet heats up 555 K (1,000 °F) in just a matter of hours, triggering "shock wave storms" that ripple out from the point facing its star, with winds that move at around 5 kilometres per second (3.1 mi/s; 11,000 mph).[12][14]
Notes
- ^ From perimeter of the orbit divided by orbital period.
References
- ^ S2CID 14433784.
- ^ a b c "Exoplanets: The Hunt Continues!" (Press release). Garching, Germany: European Southern Observatory. 4 April 2001. Retrieved 27 December 2012.
- ^ S2CID 118923163.
- ^ S2CID 14625359.
- ^ .
- ^ S2CID 2709427.
- ^ "Investigating the Mystery of Migrating 'Hot Jupiters'". nasa.gov. Archived from the original on 24 March 2023.
- S2CID 119251752.
- ^ HD 80606 Transit Times – Variable Star and Exoplanets
- S2CID 17174530
- S2CID 55219971. Retrieved 7 February 2013.
- ^ S2CID 4321053.
- ^ Robert Massey & Anita Heward (21 April 2009). "RAS PN 09/23 (NAM 10): London students find Jupiter-sized oddball planet". The Royal Astronomical Society. Retrieved 15 July 2009.
- ^ "Exoplanet Sees Extreme Heat Waves". Space.com. 28 January 2009. Archived from the original on 3 June 2009. Retrieved 29 January 2009.
External links
Media related to HD 80606 b at Wikimedia Commons