TrES-2

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Exoplanet
TrES-2 (TrES-2b or Kepler -1b)

Size comparison with Jupiter

Size comparison with Jupiter
Constellation Dragon
Position
equinox : J2000.0
Right ascension 19h 07m 14.035s
declination + 49 ° 18 ′ 59.07 ″
Orbit data
Central star GSC 03549-02811
Major semi-axis 0.03556 ± 0.00075 AU
eccentricity 0
Period of circulation 2.47063 ± 0.00001
Further data
radius 1.272 ± 0.041
Dimensions 1.199 ± 0.052
history
Date of discovery August 21, 2006
Exo-Planet TrES 2b
The home star of TrES-2b in a picture taken by the Kepler Space Telescope .

TrES-2 (TrES-2b or Kepler -1b) is an exoplanet that orbits the yellow dwarf GSC 03549-02811 every 2.471 days , is 750 light years from Earth, and is classified as Hot Jupiter . The planet was discovered in 2011 and is the darkest planet found so far, reflecting only 1% of the light . Due to its high mass , it is assumed that it is a gas planet .

discovery

TrES-2 was discovered on August 21, 2006 using the transit method. On September 8, 2006, the Keck Observatory confirmed the discovery.

Orbit inclination and mass

In August 2008, more information about the star's relationship with the planet was released. The orbit inclines by −9 ± 12 ° and rotates at the same time as the star. The planet orbits its star at a distance of approx. 0.0367 astronomical units with an eccentricity of 0% and has a mass of approx. 406.9 Earth masses or 1.28 Jupiter masses.

Albedo

On August 11, 2011 it was announced that TrES-2b has an extremely low albedo of less than 1% and thus reflects less light than coal (albedo 3–5%). This is the smallest measured albedo of an exoplanet to date. These measurements were made by the Kepler Space Telescope because TrES-2b happens to be in its field of view.

See also

Web links

Individual evidence

  1. ↑ David M. Kipping, David S. Spiegel: Detection of visible light from the darkest world . In: Monthly Notices of the Royal Astronomical Society . doi : 10.1111 / j.1745-3933.2011.01127.x , arxiv : 1108.2297 , bibcode : 2011MNRAS.417L..88K ( princeton.edu [PDF; accessed on August 12, 2011]).
  2. ↑ STANDARD Verlagsgesellschaft mbH: A planet as a light eater . In: derStandard.at . ( derstandard.at [accessed on March 12, 2017]).
  3. ↑ Alien World is Blacker than Coal . In: www.cfa.harvard.edu/ . October 2, 2013 ( harvard.edu [accessed March 12, 2017]).