Kepler-296d

Kepler-296d
Discovery
Discovered byKepler spacecraft
Discovery date2014
Transit
Orbital characteristics
0.118 AU
Eccentricity<0.33
19.9 d
StarKepler-296
Physical characteristics
2.09 Earth radii
Mass5.02 Earth masses

Kepler-296d is an exoplanet orbiting the M-dwarf star Kepler-296,[1][2][3] located in the constellation Draco.[4] It was discovered in 2014 by the Kepler space telescope using the transit method.[1][5]

Characteristics

Kepler-296d has a radius approximately 2.09 times[1] that of Earth and a mass estimated at 5.02[1][4] Earth masses, placing it in the category of Neptune-like exoplanets. The planet orbits its host star every 19.9 days at a distance of approximately 0.118 AU.[1][5] Its orbit has an eccentricity of less than 0.33.[5]

Host Star

The host star, Kepler-296, is an M-type dwarf.[2] These stars are cooler and smaller than the Sun, and often host multiple exoplanets. Kepler-296 is known to host at least five planets.[1][3]

Discovery

Kepler-296d was identified in 2014[1] as part of the data collected by NASA's Kepler space telescope, which monitored the brightness of over 150,000 stars[6] to detect periodic dips in light indicative of planetary transits. The detection of Kepler-296d was achieved through the transit method,[1][5] wherein a planet passes between its host star and the observer, causing a measurable decrease in the star’s apparent brightness.

See also

References

  1. ^ a b c d e f g h "Kepler-296 | NASA Exoplanet Archive". exoplanetarchive.ipac.caltech.edu. Retrieved 2025-06-28.
  2. ^ a b "Kepler-296 - NASA Science". 2023-11-28. Retrieved 2025-06-28.
  3. ^ a b Barclay, Thomas; Quintana, Elisa V.; Adams, Fred C.; Ciardi, David R.; Huber, Daniel; Foreman-Mackey, Daniel; Montet, Benjamin T.; Caldwell, Douglas (2015). "The Five Planets in the Kepler-296 Binary System All Orbit the Primary: A Statistical and Analytical Analysis". The Astrophysical Journal. 809 (1): 7. arXiv:1505.01845. Bibcode:2015ApJ...809....7B. doi:10.1088/0004-637X/809/1/7.
  4. ^ a b "Kepler-296". www.exoplanetkyoto.org. Retrieved 2025-06-28.
  5. ^ a b c d "Kepler-296 d - NASA Science". 2017-10-02. Retrieved 2025-06-28.
  6. ^ "Kepler / K2 - NASA Science". 2023-05-23. Retrieved 2025-06-28.

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